I thought this was really cool:
 
http://www.impamp.com/
 
Be sure to check out the demo videos-- they're great.
 
Maybe I'll get permission from senior management to get one of these for home use.
 
Brad

don't forget to also check out the zvex nano amp for guitar:
 
http://zvexamps.com/amp_view.html
 
I have number 31.

Nice stuff, all.
John