Refer the 10,000th Hipster user, win a Hipster T-Shirt and private site demo

For those of you following the Hipster story here at Hacker News, we've almost picked up 10,000 early invites in 48 hours! http://news.ycombinator.com/item?id=2093662

To speed things up, I thought it would be fun to have a little prize for the person who refers the 10,000th user.