I just subscribed to the $20/mo, 10 MB/mo plan that Cingular offers. Unfortunately, while you can use your cell phone to subscribe, and they can give you all the information you need (although it's like pulling teeth to get Mac info...like so many others, they only officially support Windoze), you can't download the necessary modem script to enable the whole thing to work.
They recommend you download GPRS Script Generator, which requires that you pay the $10 shareware fee before you can generate the necessary script. Fortunately, a very quick search on Google turned up an article on how to configure the Mac for Cingular Motorola use. It provides a modem script that seems to work well.
I have a RAZR V3, and I modified the script to connect at 115200 bps (rather than the default 57600). It worked great!
This is all temporary, of course, 'till I get my 3G card. We'll see how smoothly that goes...

This note briefly describes how to set up PWM on an ATmega32. In this instance, Timer/Counter 1 (16-bits wide) is used to set up a Fast PWM-mode PWM wave to drive a typical R/C servo. The PWM period is 20 ms (50 Hz), and the pulse width varies from 0.9 ms to 2.1 ms.

With a 16 MHz clock, the full 16-bit count wraps around in about 780 µs. Since we need a PWM period of 20 ms, this is clearly too fast. Prescaling Timer/Counter 1 by dividing the sytem clock by 64 gives us a full-count period of 50 ms. By setting the upper limit of the count using ICR1 to 12500, this results in the desired 20 ms period.

Update: I’ve gotten some math wrong in the preceding paragraph, and I'm not sure what I was thinking. It seems that a full 16-bit count would take 4.096 ms at 16 MHz. Also, the comments in the code regarding prescaling values don’t all agree. Sorry about that. I hope you can still find this useful.

To get the appropriate servo pulse width between 0.9 ms and 2.1 ms, the OCR1A register is loaded with values between 225 and 525.

Circuit Set-up

Please excuse the lack of a schematic; I simply don’t have time to create one right now.

The ATmega32 is set up to run with a 16-MHz crystal oscillator. On the PDIP 40 package, the following pins are connected:

Fuse Set-up

The fuses are set for a 16 MHz external crystal oscillator.

Register Set-up

The following registers are set, in this order. Although the order isn’t strictly necessary, some subset of it might be (be specific).

Code

#include <inttypes.h>
#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/signal.h>
#define kPinInitCompleteLED         PA0
#define kDelay                      10000
#define kReverseDelay               300000
#define kLowerLimit                 300                 //  Min 225 == 0.9 ms
#define kUpperLimit                 450                 //  Max 525 == 2.1 ms
int
main()
{
    volatile long       d;
    short               dir = 1;
    
    //  Set LED output pins…
    
    DDRA = _BV(kPinInitCompleteLED);
    DDRB = 0;                                           //  Port B inputs
    
    //  Set up OCR pins (PD4, PD5) as outputs (00110000)…
    
    DDRD = _BV(PD4) | _BV(PD5);
    
    //  Set up Timer 1. Timer 1 should reset when
    //  it reaches TOP = ICR1 (WGM13:0 = 1110b). On
    //  compare match clear output, at TOP set (COM1A1:0 = 10b).
    
    TCCR1A = _BV(COM1A1) | !_BV(COM1A0)                 //  Both PWM outputs set at TOP,
                | _BV(COM1B1) | !_BV(COM1B0)            //    clear on compare match
                | !_BV(FOC1A) | !_BV(FOC1B)             //  PWM mode, can't force output
                | _BV(WGM11) | !_BV(WGM10);             //  Fast PWM, TOP = ICR1
    
    TCCR1B = !_BV(ICNC1) | !_BV(ICES1)                  //  Disable input capture noise canceler,
                                                        //    edge select to negative.
                | _BV(WGM13) | _BV(WGM12)               //  Fast PWM, TOP = ICR1
                | !_BV(CS12) | _BV(CS11) | _BV(CS10);   //  clk(i/o) / 1024
    
    //  PWM duty cycle…
    
    OCR1A = kLowerLimit;
    OCR1B = kLowerLimit;
    
    //  PWM period…
    
    ICR1 = 12500;
    
    //  Show initialization complete…
    
    PORTA = _BV(kPinInitCompleteLED);
    
    //  Loop forever steering left-to-right-to-left…
    
    OCR1A = kLowerLimit;            //    Min value == 0.9 ms
    while (1)
    {
        d = kDelay;
        while (d--);
        
        OCR1A += dir;
        
        if (OCR1A < kLowerLimit)
        {
            OCR1A = kLowerLimit;
            dir = 1;
            d = kReverseDelay;
            while (d--);
        }
        
        if (OCR1A > kUpperLimit)    //    Max value == 2.1 ms
        {
            OCR1A = kUpperLimit;
            dir = -1;
            d = kReverseDelay;
            while (d--);
        }
        
    }
    
    return 0;
}

I should've been packing, and then sleeping, before getting up at 0600 to catch a flight to the ’rents for the holidays. Instead, I spent the day (after work, of course) finishing the car, an HPI RS4 Pro 4 Hara Edition electric R/C. Three long nights, perhaps a total of 25 hours' build time. Here's a picture of the (more-or-less) finished car:

Click for a larger image

There's also a large Gallery of pictures taken throughout the build process.

Overall the kit is well-crafted, with high-quality parts and a clear instruction manual. I do have a few complaints about the parts references, which caused me to waste a bit of time searching parts bags, but in the end, no necessary part was missing. I'll try to post a more thorough review, along with descriptions of the specific issues I had.
This car will be my (actually, my team's) entry into next semester's EE192 class and next year's Natcar competition. Hopefully the professor will allow us to use this car, and our intended processor, the Cypress PSoC.

The North American Solar Challenge is a great race in which college students from all over the US & Canada build highly aerodynamic and efficient solar cars, then race them thousands of miles across North America.
I'm watching a bit of the race on INHD right now, and something ridiculous struck me: each solar car is trailed on the road by five or so gasoline powered cars! Irony in the extreme.