Are you a querying (or soon to be querying) writer? If you've started compiling your agent query list (with QueryTracker, I hope), you know that matching your manuscript with the agents who are most likely to love it isn't for the faint of heart. I used to rely mainly on several blogs that would do detailed agent profiles, but my favorites haven't been updated in a while and the information is somewhat stale. This is a big deal, since what agents were looking for two years or even six months ago is probably not what they're looking for right now.
Luckily, I found a truly excellent resource to replace those blogs! Manuscript Wish List is the brainchild of agent Jessica Sinsheimer and writer KK Hendin. They took the idea of the #MSWL hashtag on Twitter (where agents and editors tweet things they wish they were seeing in their inbox) and expanded it to a whole website. While the tweets were limited to 140 characters (135, counting the hashtag), this site has whole paragraphs describing their wants in detail.
One of the best things about the site is its HUGE list of tags. Scroll down to the bottom of any page to see the list of tags that have been used on the posts. They are very specific and extremely helpful. For example, you'll find tags for "strong female protagonist," "steamy romance," and "difficult issues." There are also tags for comparable books, so you can even search for a similar type of story.
I found over a dozen agents that wouldn't have been on my list otherwise by using this site. I highly recommend it!