Is there a multi cryptocoin wallet cleint or service? I'm asking because I'm using the www.multipool.us pool and I would like a central client to store the coins. 
There are some wallets for multiple coins, but probably not for those new coins like doge.
Maybe you can try middlecoin.
Quote
This pool automatically mines the most profitable scrypt coin, automatically exchanges those coins for bitcoins, and pays out entirely in bitcoins.