I looked in my sphsgminer/kernel folder in multiminer and i was surprised to see a "keccak.cl" kernel there. I didn't tried it because of the error to chose a keccak miner in multiminer but maybe we can already mine keccak with sphsgminer. May worth a look into this...
Nah - good call but I checked this before. It's in there for the Darkcoin / X11 support. Keccak is one of the algos used by X11. But support for independently mining Keccak isn't in there.