I have started mining Dogecoins on my unused GPU. It is a new scrypt based coin which is based on the Doge meme. Really, I am just playing with Scrypt coin and given I only have a 7870, I wanted to get in on something that the difficulty wasn't too high on.
Can convert them straight across for LTC/BTC or hold them. They are really quite popular on Reddit and it might help them get a foothold.
I sold for the first few days, just thinking it was an easy way to mine BTC with my GPU, but I am holding them for now as the price seems to be dipping, and have a (very) minor amount of BTC set aside to buy them if the conditions looks right.
Pool I use:
https://dogehouse.org
Exchange I use:
https://www.cryptsy.com/
Some threads on Reddit:
http://www.reddit.com/r/dogecoin
http://www.reddit.com/r/dogemining