For those that have not heard, Groundspeak and Tomb Raider.. here is the announcement from the Tomb Raider Blog
A few clips
The collaboration will be executed through a series of location-based, worldwide adventures. Challenges will unfold through both the traditional treasure-hunting format established by Groundspeak, and the more recent photo-based framework, Geocaching Challenges.
Everything is really tight lipped. The game is not going to be released until the 3rd Quarter of 2012 (July-Sept). So I would not expect much until right before the game will come out. I thought I read somewhere that there was going to be something monthly. The apes were released one at a time, this one as well? How many, and what? Perhaps a new icon? Who knows? Mouths are shut tight at the moment