I posted a short review of the Line 6 JM4 Looper along with a couple of samples I recorded. These are more to illustrate how easy it is to record with the JM4 Looper than to demonstrate any particular guitar skills. I think the JM4 Looper is quite cool and it will be interesting to see if Line 6 does any further updates to this product.

http://www.guitarvibe.com/2009/11/line-6-jm4-looper.html

Enjoy!

--Zack