The Apple folks has had it all in the past: First iTunes, then Airport Express, and lastly Airfoil from Rogue Amoeba. The Airport Express is a nifty piece of hardware which allows you to stream your music to a set of speakers wirelessly. The one caveat to this was that you could only do so from iTunes on the PC tying you to Apple’s music platform.
I use the past tense because Rogue Amoeba (love the name) has released a beta of their Airfoil application which acts as a shim between any audio application and the Airport Express allowing you to stream from any application to you Airport Express.
I’ve already bought a license for the sucker because I live in an area where radio reception is extremely bad but with Airfoil I simply fire up Media Player and connect it to my favorite net radio station and presto: Beautiful reception where previously there was none.