yes, it will support eyefinity.

I was talking with the lucid guys today, and the entire system is transparent to the display drivers s well as the game.

Basically, the hydra chip sits between the directx layer and the graphics driver layer and intercepts all the draw commands. The draw commands are then load-balanced and rendered independently. The only thing I'm confused on is how the display data gets from the rendered card to the display card if the drivers don't see it. maybe the hydra chip does this transferring around as well, didn't think to ask at the time.