I'm starting a new thread in order not to pollute the SSGC racer thread any further. There has been 3-4 expressions of interest in this idea already, so probably enough to proceed.
The idea for the contest is that by limiting the size of the task hopefully more people will join. Writing a game for a 512K cartridge may seem overwhelming, but with only 4K available there's a natural limit on the time you can spend. We could also choose 2K or 8K, but I think 4K is a good compromise between having room for a bit of graphics and the time it takes to produce.
My first idea was that the 4K would be ROM, but since 4K RAM is what the Mini Memory provides we could also make this a contest for a game to run on an unexpanded console with a Mini Memory? Unexpanded means no 32K, speech, disk, RS-232, or F18A required. I think this is important to limit the task and make the entries comparable. I think it would be OK to require joysticks.
See rules here: http://atariage.com/...-2#entry3919501
And one more addition here: http://atariage.com/...-3#entry3920373