I use TVersity and it works pretty good.
Hey David, as a side note, I started with TVersity too and it worked really well except for streaming HD videos (clearly not what the OP is after). Also one feature that I like about Twonky is that it will read all of the playlists you have saved in iTunes and make those available over the Denon/PS3/etc. I manage all of my music in iTunes, so for me this was a big plus. If you're not hooked into iTunes and don't stream big videos, either should work just fine.
Also, it's been almost 8 months since I tried TVersity, so it could be much improved from the last time I used it.
Jason
