Seems like everything is getting USB-connectivity these days. The Samson condenser microphone has been out for a while, and not Behringer is releasing a .
iAXE393 USB-guitar, the Ultimate Electric Guitar with Built-In USB Port to Connect Straight to Your Computer. Jam and Record with Killer Modeling Amps and Stomp Boxes. Seems like it only outputs digital audio, though. Would have been interesting if it had had a built-in audio-to-MIDI (or even better to OSC) converter.