Gibson recently announced the Memory Cable, a $99 guitar cable that records up to 13 hours of audio onto a mini-SD card. It’s a pre-amp recorder so you won’t get your amp signal. I think this would be great for recording how you sound on stage or in practice. It’ll be a clean sound, so you can reamp it. That said, I think recording clean and listening back is a great way to hear how you really sound.
Mark Crump 