I had seen this in my reading travels, and now Hiawatha Bray reminds me of it.
Live music events are offering a kiosk services where, immediately after the event, you can insert one of those little keychain, USB, memory modules, and download music from the just finished performance. They'll even sell you one of the memory modules if you forgot yours. You take it home, plug into your computer, tranfer to your digital music gadget of choice, and listen.
AP Technology via Yahoo!:
Oh, how far we've come from the 78, the 45, even the CD. Now, minutes after your favorite band sounds its last note on stage, you can load a live recording of the concert onto a cigarette-lighter-sized hard drive hanging off your keychain.