Right, this is my first post, i've read the rules and whatnot and i'm pretty sure it's in the right place. I saw The Arcade Fire at Leeds Fest this year and the guitarist was holding, what looked like, a small mobile phone in his hand. It seemed to generate sound without him picking the strings. I was looking on the net to try and find what it was but with no luck. Just thought i'd try here to see if anyone could help.
Possibly an ebow - Adam Jones of Tool also uses an epilator for the same effect. If it was a phone it could've been a high pitch playing and feed into the pickup.
Yeah it's an eBow, I'm pretty sure of that.