AirPort Express with AirTunes... coooooool...
Yeah, Mac fan in the body of a .NET developer, sure, but Apple keeps making some really cool stuff.
This solves two problems for me in the same place. First, it extends my network to the Xbox, so I can finally DDR on Xbox live. Second, it pipes audio from my PC up in the office down to the same rack that contains the Xbox.
Very cool!