So, I'm just getting into robotics, but I think this is a fun idea to play with.
My first robot will of course be one of the simple robots people post around the net, but for my second, I'll take the basic knowledge I've garnered and put it towards a pair of bots aptly named, "Hide and Seek".
One will be the hider, and one the seeker, again named in order, "Hide" and "Seek". They will probably end up using something like the Pololou IR Beacon.
Hide will promptly scurry around the room looking for a dark corner to hide in. From what I gather, this can be accomplished by two methods. One will be a simple photo sensor seeking for a dark corner. The second might be a sonar rig (like YDM uses) looking for interesting places to hide. Once he finds a place he likes, he'll sit still and wait for Seek to find him while emitting IR light from the Pololou IR Beacon.
Seek will be much simpler. He will simply skitter around the room looking for dark places (similar to Hide) until he spots the IR light coming from Hide.
I think this could be a pretty fun project. It seems like I know the general idea of how to accomplish it, now it's just a matter of learning the skills of piecing everything together!
Of course, once I get started, I'll be posting a guide on all of it here on this site.
Any thoughts, comments, tips, or criticisms are 100% welcome!