I came across Syswear this morning, and I think I want to buy every T-shirt they have. This is definitely a shop for Geeks. Their prices are reasonable, and they actually carry XXL. Nobody ever has shirts that big. This is one of my favorites:

I think some of the developers I know need this one:

These can be shipped to you in around 2-3 days, and it looks like they ship to UK, Europe, and the US. Happy shopping and I’ll let you know which one I decided to get!