"you can send a post card of your avatar’s face or some other theme via second life to a real world address. i don’t know if this is really useful, but it’s a quite cool idea".
For this direct teleport to "PostTower" you need to have SecondLife installed. Very well done, SL'ish, with many signposts to help visitors to get along, video tutorials and the like. DPAG must have invested loads of (real!) money...