There are rumors[1] that MtGox will be announcing Litecoin and Namecoin support this week, which may alleviate things. (Litecoin has four times the number of mine-able coins that Bitcoin has and its proponents refer to it as the silver to Bitcoin's gold.)
[1] Based on their API responding to LTC/USD requests (http://data.mtgox.com/api/2/LTCUSD/money/ticker) and some Twitter chatter.