I did it. I started and finished a 24 page comic Saturday, begining at 12 AM October 1 and ending at 11:55 in the evening. I won't lie: it's pretty rough and far from perfect. But I had a blast doing 24 Hour Comics Day and learned a lot in the process.
When I vowed to tackle a comic in the span of a day I thought, "Okay, it'll be tough, but really how tough?" and let me tell you, it is easily the most insanely brutal creative undertaking I have ever attempted. And that is why you should do it. There's nothing quite like pushing your limits as an artist to learn what stuff you're made of. At the end of the day, I suspect we're all capable of quite a bit more than we give ourselves credit for and it's in that metaphorical jumping off of the cliff that you figure it out.
Another thing I took away was a greater appreciation for distilling story and art to their most basic levels. After finishing the first few pages I crunched some numbers and realized if I kept going at that pace, I'd be participating in 48 Hour Comics Day. Yikes! It became very much do or die at that point and I began zeroing in more effectively on what elements were crucial to the story and which were superfluous. It's a process that forces you to make quick, gut decisions and there's something to be said for that.
I'll put up a link here in the next few days (as soon as I catch up on other work and my wrist stops mutinying). In the meantime, here's a look at one of the panels above.