Not a hell of a lot of us putting guitar samples in our electronic music (I think, anyway) but a friend of mine's company put out a free app which has hit #1 free download in the Japanese store (and is maintaining it's spot). It went to #9 I think in the US store but has lost momentum. So, figured I'd lend a hand. Someone here might want a funky riff for a break. It's free, w/ in-app guitar purchases. <-- this one has a quick demo which is a bit more to the point.