I'm running 2011-04-03-pre and the CUDA miner stuff is all working quite well.  Sorry for the slow reply.  I've been messing with all manner of combinations of driver versions and console commands for my 460s and came up with pretty much what I expected from the get-go.  Now with driver version 270.51 and rpcminer-cuda arguments of -gpugrid 128 -gputhreads 128, I get 128.6 MHash/s for my two overclocked 460s.  I'm still thinking that I may not mine for much longer.  It doesn't seem to be worth it on nVidia hardware while paying for electricity.

I've got a question.  Does the console view display both miners crunched together or will it display only one miner at a time?  I'm seeing lines similar to "Line: 64256 khash/s".  If it does display both miners, it would be helpful if the name of the miner was put in the front of the line, like "Primary: 64256 khash/s".

By the way, the balance button is quite nice.