Every year there's a challenge run that has participants getting together and making a 24 page comic in within 24 hours. This year's challenge is October 18. You can either go to a hosted store where there's tons of people participating next to you or can do it at the comfort of your home. You just need to follow the rules and sign this form and send it to Scott McCloud along with your comic. I think I'll be doing one this year. Sounds like a bunch of fun. And so what if my drawings suck? Heh. Tokka, you should definitely try it! I'd also like to see if Tristan would do it!
Here are the websites where you can find the rules, etc etc.