Thanks, guys! Swachski - it's true, I was so depressed. I couldn't get the opening to where I wanted. Then one agent sent me a revise and resubmit, saying she thought the voice was trying too hard, so I tweaked and tweaked. I sent the new version out to a few other agents, to test it before I sent it back to the first agent - and I ended up with two full requests! What makes this exciting, for me, is that both of those queries included a good chunk of writing - 8 pages and 15 pages, and my writing didn't scare them off!
Sage - yep, that's the one. My baby, born of Smish's writing prompt and lots and lots and lots of feedback here. Including yours!