Still with me? Okay, good. Since I am going to Grand Junction this weekend, I put Saturday's date (2008-05-24) into the map lookup
Here is the group participation part of this extremely nerdy game: there is a "meeting" every Saturday at 4:00 p.m. at the randomly determined location in each graticule (area within the integer lat, lon lines) where, if anyone shows up, you have a little party. Or something.
Not sure if this little concept has any staying power once the novelty wears off, but if you just need a random place to meet someone within a certain geographic area, it should work pretty well, as long as the place is accessible, that is. Since, by the very nature of this thing, it is random, the coordinates might end up in a lake, the ocean, military base, cliff, inaccessible mountain, etc. If that happens, I suppose you can either wait for a better location or just put in another date and see what happens.
Sorry, that was too nerdy not to share! Check it out!