700-series doesn't work, the hole spacing it too different. The spacing is too close IIRC, and "little Maxwell" runs so cool that putting a water block on one is a little silly. I'll just have to wait and see with Maxwell. I know Kepler stuff will be hitting the market now that the 970/980 are out, but I know if I bought something in that category I'd be pining for Maxwell soon enough. I'm a little tempted to go back to air just to ease my own frutrations, but my case is dedicated to water at this point with the triple radiator hard mounted to the front. Buying a new case would just add to the cost and complexity of my supposed "motherboard upgrade", so I can't really justify it.
EVGA already has a full cover block out for the 980, I'm sure other vendors will follow suit for that and the 970 and hopefully Swiftech will say something about MCW82 compatibility before too long as well.