I've blogged about this in the past: how I tweeted about a problem and, lo, someone saw and I got it fixed.
Worked again! A friend found an orphaned kitten, she needed some help with feeding him, etc., and I tweeted about it, and another friend saw it, and that friend now may adopt the kitten. I mean, is that cool, or what?
Just imagine if the WORLD problems could be solved that way? Just imagine if a social network could be harnessed to get everybody thinking about a problem and how to solve it.
Oh, yeah.... I'm off to think about THAT one!