Good luck. Make sure you quit and do it, though. There is no better time than the present... with Posterous we could have waited another 6 months to apply to YC, but I have no regret at all that we did it earlier.
Anything can happen, and tomorrow is not promised. So start. =)
http://foohack.com/2008/08/why-im-not-working-on-my-startup-...