The Mojang offices in Sweden are located just a few short blocks from the EA Digital Illusions CE AB offices. If you don't know who these wonderful people are, they are the team responsible for the awesomeness that is Battlefield Heroes!
If you're interested in free things (and who isn't?) you can head over to this page and get a FREE in-game Minecraft t-shirt!
You better hurry though, as the offer is only valid through the weekend!
UPDATE: Apparently the servers are stressing out a bit! Dont' worry though, you have all weekend to claim the t-shirt!