I figured it was time to quit my lurking and get involved. I'm ready to query, but I definitely need some fresh eyes on my query letter. Even as an observer, I've found this site incredibly helpful, so thank you to everyone who has unwittingly encouraged and educated me!
Now, I'm off to wet my feet by critiquing someone else's query. That should be a good learning experience! (Also: tit for tat and all that ).