Were you able to leverage the YC "old boys" network? (I mean that in the positive sense, not the negative one)

That is, did having access to talented former-YC people help you get over the technical humps and hurdles? I believe one of the main pros to joining YC (apart from getting mentoring from PG et. al.) is that many of the people that went before you are on tap to help resolve things in a "pay it forward" fashion.