To win, find a published chapter you like. Then continue that story by writing and publishing the next chapter before Midnight April 20th, 2008 UTC. The winning entries will be determined by the ranking of the site’s readers.
Prizes are as follows:
1st Place - $300
2nd Place - $150
3rd Place - $60
StoryMash also brings up a good point. The sooner you do it, the better because it will give your chapter more time to collect votes.
If you haven't yet registered as a StoryMash author, $300 says you should! Do so now, because you can't win if you don't write!