It is full of helpful tips. Interesting feedback on real queries and why they worked. Word Counts for just about every genre. Q&A's with agents. Also Agent Alerts that let you know when a new agent has joined an agency (please note new agents are building up their client list...good for first time writers :) )
And loads of other stuff. It's hosted by Chuck Sambuchino the editor of Guide to Literary Agents.
Chuck also set up on the left hands side certain categories you can click if you're only interested in a certain thing like for example Successful Queries, or Children's, Christian etc.
Hope those of you who haven't seen this site check it out---it's one of my absolute favs and the one I actually follow habitually! ;)