[Yapc-na-organizers] a few updates

[Joshua McAdams]

> * T-shirts: I've nailed down a vendor, he needs at least 2 weeks lead
> time to get the shirts printed and delivered. Under this 2 week
> window, last-minute sponsorships wouldn't get t-shirt space -
> thoughts?

Just make sure that potential sponsors know about the deadline... only
tell them it's a three-week wait on the shirts so that you have a
buffer for the indecisive ones.