I think most people would appreciate some feedback on something they work hard for, even if it's just an "atta boy, looks good, keep on going--sorry it didn't work out", or even better some productive feedback ("you need to narrow your focus" or "market already saturated").<p>I have never applied for YC, but I have applied to other things in life that seem like a black hole from the outside. Just an acknowledgement of something that surely took a lot of time would be a nice gesture. I mean, I'm sure you're nice folks, right? Would you ignore applicants if you met them on the street?