I think I'll try to stay away from single coins from now on. Single coin mining approximates theoretical profitability for that coin anyway, and it can be calculated without mining. I'd rather use my spare hashes to evaluate services that try to beat any single coin.
This is very impressive and enlightening work! Thank you!
At some point it might be interesting to determine which pools are purely scrypt just to start watching if ASICs are having a real impact or not. Of coarse the data wouldn't be pure because even pools that can do scrypt-N etc, may jump on a scrypt coin. Just a half-baked thought.
Granted the cost of 1 MHs ASIC scrypt will likely be much lower, so maybe still profitable or much more profitable. It appears some ASIC solutions are breaking $.20 / KHs. http://zeusminer.com/?product=blizzard1-2mhs