Sony STR-DA6400ES Owner's Thread - AVS Forum
http://pdf.crse.com/manuals/4104900111.pdf
It looks like you need a "DNLA-complaint' device, and have to go though a network. You can't straight from the computer to the receiver. It also sounds like it only does internet streaming. No mention of other types of players, like Foobar or iTunes.
More trouble than its worth...back to the disc player for me.
BlacX to Drobo is a natural evolution to me, as eventually you have piles of random drives with the same stuff on them; why not take advantage of them at the same time?
I haven't looked into this drive for a long while, so memory is fuzzy, but I believe WD also came out with a server-grade Velociraptor that doesn't have the heatsink edges. I can only assume it was the proper 2.5" length, but I truthfully don't really remember.