Post Update: It appears that this valuable link below is now off limits to non-members of Verla Kay’s site. The good news is it should be very easy to become a member of her site and forum, so sign up.
It seems that Jennifer is trying to become a full-fledged agent, and needs clients to do so. She focuses on middle-grade and young adult work, and tells all about what she doesn’t want to receive, as well. She mentions that she is only interested in queries/etc. that have not been turned down by Andrea Brown agents previously.
This seems like a golden opportunity for writers, so check out the full post!