THere's a Groupon for CafePress today. WHy do you care? Because it's cold out. And DC Tri has a CafePress shop where you can buy ... Hoodies! And like lots of other stuff.
But seriously, hooded sweatshirts are the bomb.

Here's the links:
http://www.cafepress.com/dctriclub

http://www.groupon.com/deals/cafe-press-washington-dc-1

Or you know if you want other tri-related stuff, there's this site too:
http://t-shirts.cafepress.com/gymskinz

I'm partial to the "Save a bike, ride a triathlete", but I also have questionable taste.

Bikes have feelings too, you know.