Sorry about your loss, that blows. You've probably got a good chance of finding it though, sounds like it was pretty easy to steal, so I'm guessing it was either kids or crackheads.

And not to rub it in, but enlacalle andwallace are totally right. Either bring it in, or lock them up to something in the hall if you have to keep them out there. I have five bikes inside an LES studio, and usually keep them locked together inside.

Did you file a police report? I know it sounds kind of corny and useless, but if you do find someone on your bike things could get really nasty, and it's not a bad idea to have proof that it's your bike and it was stolen to back you up.

In any case, I'm all over the city and will keep an eye out. Good luck.