Slush already supports MM (BTC+NMC). It was among the first (if not actually THE first) large pools to implement the merged mining.
Which raises the question, WTF are the folks still mining for DeepBit thinking?
I wonder why doesn't Tycho implement MM? Does he have something against NMC?
Well, for one it's most likely some work to do with possible risks of pool downtimes and people leaving. Two, where is the point in nmc other than the societal good it might one day bring? Forget nmc if you think you can really up your btc income by anything worth the trading effort recently. Prices are in the basement.