Happy birth day Stack Overflow.
It's 10th anniversary and a t-shirt and a mug isn't good in this occasion. but it's a huge community and you can't gave costly things to everyone who participate. I'll say, an exclusive Stack Overflow t-shirt, a mug or a bottle will be good. Yes I highlighted it in bold because I expected a Stack Overflow t-shirt as a swag for last year winterbash and you sent me a Stack Exchange one. Lot of people asked me why the Stock Exchange sent me a t-shirt, including my father and I wasn't really happy to pay the duties for a Sta(o)ck Exchange t-shirt. But I can pay up to $20 as duties for an exclusive Stack Overflow t-shirt.
Once again, Happy Birth Day Stack Overflow.
Proposed Challenge: Ask people to draw a doodle every week and put it as site logo for 1 week.