For those of you who don't know about the blog Miss Snark's Next Victim, it's a cool contest blog. A couple times a month, she will announce a contest - it may be a first page, or just a first sentence, or a particular kind of scene. There is usually a really limited entry time, so you have to be ready.
When the entries are posted, anybody can comment. But she also has a few agents who lurk. (And once a month or so she has an official "Secret Agent" contest which will be judged by an unnknown agent.)
I entered the first page of The Man Who Did Too Much in today's mini-competition. Stop by and have a look!