Streaming sound from the middle?

I’m building a podcast player in Flash that’s streaming audio files that are usually in excess of two hours long. I’d really like to include the ability to skip around to sections of the audio that haven’t loaded yet, the same kind of functionality that you’d see in any browser-based video player. This would be especially important for allowing users to pick up where they left of on a specific podcast without requiring them to download the entire file.

I’m still feeling my way around the Sound class, and so far I’ve only been able to stream external audio files from the beginning. Is it possible in AS3 to stream only the portions of an audio file that a user specifies?