I've got a Roland PMA-5. While it's not much by way of studio recording, it's a fantastic practice tool. I'll be making and posting up bunch of straight 4/4 loops of different keys, but if anyone has a request, post it up here and I'll get you a loopable mp3 of something. So if you've ever thought "I'd really like to try writing something in C m7 sus4", let me know and I'll accomodate you. I use them to get the hang of soloing over uncommon (and just plain fun) keys.