From the profile:

Projects run out of the hacker house: http://divvyshot.com http://www.wonderwarp.com http://ipodrip.com http://www.wattvision.com http://tinycoupon.com http://bluwiki.com

What is the hacker house? I've heard it mentioned before, but don't know what it is.

That is such a cool idea. Sounds much more fun than renting an apartment. Any other ideas like that ever come up? Is this something common among, say, YC applicants?

well one of them looks like http://280north.com/

Nope. That's 40 North ;)