A hint about Matt's disastrous prior dating life... his mom might be right to be extra worried :)
I was thinking about trying one of Scott McCloud's 24 hour comic days. The only thing is... isn't it actually way less than 24 hours?! The rules are very strict, in that you cannot plan anything ahead of time. In addition... if you sleep 8 hours, doesn't that leave you only 16 hours??
But on the other hand, you only need to produce about 100 panels. I think it can technically be done, but... hmm...