This may be a pretty simple switch but I'm pretty proud of this guy just because it's the first pedal that I actually designed myself. If anyone else is interested, I can draw up a schematic for you guys. The only downside for me is that its possible to run down the battery if you leave it engaged even if its unplugged.
(http://img15.imageshack.us/img15/1107/img8126ey.jpg) (http://imageshack.us/photo/my-images/15/img8126ey.jpg/)
(http://img695.imageshack.us/img695/3112/img8131x.jpg) (http://imageshack.us/photo/my-images/695/img8131x.jpg/)
(http://img404.imageshack.us/img404/774/img8129b.jpg) (http://imageshack.us/photo/my-images/404/img8129b.jpg/)
Deceptively small in that 1590a 8)