Those who succeed in building their own Open Grid beta enabled OpenSim and teleporting from there to Linden's Vaak region (on their Aditi betagrid), get to call themselves "gridnaut". Gridnauts can claim a trophy bear, allowing you to show off your OpenGrid prowess in the Second Life main grid :) I got mine from Whump Linden a couple of days ago. This is how it looks:
I like it. Too bad I can't get one in real life!