This is a viral achievement spread through the co-op mode of the game. To get this you must play a co-op game with someone who has the achievement or is an employee of Gearbox (gamertag starting with GBX).
On October 23rd, 2009 there will be a game with Gearbox event (http://www.xbox.com/en-US/community/calendar/gamewithde....htm
) for Borderlands. A good bet to play with the devs is to sign up for this event.
On this page you can click the link listing the tracked gamers that have the achievement and ask to join their game (especially if they are boosting).