We just received our rejection letter. Major shame, but wasn't at all unexpected. Based on Analytics and MixPanel our demo we set up wasn't actually tried, so I guess the takeaway from this was that the application wasn't as strong as we thought. Even so, the entire process of writing the application was very rewarding. It really did help focus our direction into something concrete.
Incidentally, since it's all over, here's what we posted for "tell us something interesting". (I think that was the question). I posted how 1/998001 is an awesome number!
http://rentivo.com/ycombinator/divide
(Perhaps I shouldn't have shown the PHP code! Ha. It's hard to make something so hacky not look so ugly).