Apple unleashed a slew of new things today, and one of the most important things (to me) is the new interface for the iTunes Store, the iTunes WiFi Store. As you might expect, the iTunes WiFi Store lets you browse and purchase music directly from your iPod Touch or iPhone (over WiFi). All music purchased from the iTunes WiFi Store will sync back to your iTunes library (sweet!).
Sadly, it seems this is limited to audio only, no video. Oh, and no word on if you can subscribe to podcasts via this interface (that would be insanely cool).