You cannot do it yet, but if one app developer gets approval for his wireless sync app — you might be able to do it soon. If Apple lets the app onto the marketplace iPod Touch, iPhone and iPad users will be able to sync their iTunes collection to their devices without any wires!
Below is a video of how the pairing process works. The developer says it will work with both Mac (as seen in the video) and Windows. It will be submitted soon.
For those of us using iPhones, iPod Touches, and iPads, let’s hope that Apple pulls an Opera Mini on this one and surprises us all by actually approving the app. Better yet, maybe they could just put it in iPhone OS 4.0. The most likely result will be a trip to the Cydia app store for jailbroken devices.