For now, I'm just sitting on mine, which is pretty much what anyone else is doing since it doesn't seem like the system is fully up and running yet. That seems to be the case with ANY cryptocurrency until some sort of infrastructure and economy are built for them.... back in 2009 or 2010, what could you REALLY do with Bitcoins? Not nearly as much as today.
As for that infrastructure thing, I just saw today that
ABitBack.com is "soon" going to be offering Ripples among their rewards, in addition to Bitcoin and Litecoin (thread here:
https://bitcointalk.org/index.php?topic=173660.0). ABitBack is one of those sites where you complete offers (watch a movie, fill out a survey, download a game, etc) and earn points which convert to Bitcoins when you cash them out. I've had pretty good luck with them (339 points in about a week, and I wasn't even trying that hard), so if you dig that sort of thing, you might want to check them out.
I'm more excited by the fact that they offer Litecoin as a reward, since there's so few ways to get them right now other than mining (compared to Bitcoin, that is). Once the Ripple reward is up and running, I MIGHT cash in for them, too.... who knows?