Thread creeping for the GAS junkies.

There are some additional slightly odd guitars under. I especially like the five necked one (how heavy is it? what does the case look like?)though some of the ones on the last link are pretty bizarre and more suited by a siamese triplets or an octopus...

Lots of harp guitars

Confusion between number of fingers and necks

The self tuning guitar

More necks than a tower of giraffes