[allbutlost]

Airplay should indeed be available for you in the iPad app - see http://www.spotify.com/us/about/spotify-on-ipad/

[bni]

It also enables the AirPlay button in the iPhone app. So now you dont have to fiddle with the built in iOS controls. It also seems to work better now, the music starts faster for example.

Now if they only enabled AirPlay in the Mac app...