Does your current Blu-ray player offer multichannel analog output? If so, you could give that a try for the cost of just a few analog cables (assuming you don't already have then lying around).

I do expect that we will probably see a true universal player at some point - probably from somebody like Denon first, but eventually from others like OPPO Digital as well. That assumes that both HD formats remain in the marketplace for at least a couple years, which seems likely at this point.