[nyphot]

I think Kiva's pretty awesome. I've been "investing" money there for over a year and I think pretty much all of my initial investment has been paid back (and been given out again).

There are a number of other great microfinance organizations out there (the other main one that I support is Opportunity International but there are many others) so I'd encourage everyone to check out others in the future... but Kiva's the best bet for getting your feet wet, I think.