There's a pretty cool contest going on over at Shelley Watter's blog. You can find the details here:
Entry into the contest involves the usual stuff (follow the blog, twitter about the contest, etc), but you also must write and post a twitter-length pitch for your WIP (140 characters). Now, I know that's a huge challenge to condense your book length story into a 1-2 sentence summary, but that's exactly what makes entering this contest totally worth it. Even if you don't win, it's a great exercise for getting ready for the querying process.