What mining pool or pools are being used? Do you have plans to use merged mining pools, especially while the Namecoin difficulty is still low?
I am currently mining at ARS as it provides a steady stream of income. At the moment BurningToad hasn't announced any merged mining plans, but I believe he is working on it. If I prove to be wrong,I'm not sure if I will move pools to one that does have merged mining as it would cause me more work, but I am looking into it, and will let everyone know what my plans are soon.
You should consider moving to a merged mining pool. With the current bitcoin difficulty of 1,468,845 and namecoin difficulty of 94,036, in the time it will take you to mine 1 bitcoin, you will also mine 15.62 namecoins, which you could sell for 0.41 bitcoins, a 41% increase in yield. With the current USD/BTC exchange rates so low, merged mining of namecoins could mean the difference between turning a small profit and barely paying for utilities.