Most AirPlay wireless speakers are built on top of a BridgeCo chip that enables Apple's wireless music streaming feature, but the new AirGo indoor / outdoor speaker from Russound does it in a slightly less integrated manner: it has a built in weatherproof slot for an AirPort Express, which handles all the dirty work. It's clever, but it's not cheap: the AirGo itself is $399, while an Airport Express will run you another $99. Still, it's the first permanent outdoor AirPlay solution we've seen — we'll see if any more integrated options surface in the coming months.
AirGo outdoor speaker does AirPlay the hard way
AirGo outdoor speaker does AirPlay the hard way/
The AirGo indoor / outdoor speaker has a slot for an AirPort Express so it can stream music over AirPlay.