Chris,

tRio supports flac, but twonkyvision doesn't (as yet). And with wma its the other way round. I can't speak for the twonkyvision on the flac issue, but I don't see a burning need for wma in tRio (I am not a ms fan).

But there are some transcoding UPnP servers out there that might acheive the effect you're after.

Cheers
Paul