Although these may be 10 years old now, bizarre guitars never go out of fashion here at guitar-list. Barry Wood, of the website "The Other Room" put together a page of oddities from the NAMM music show in 1998. You have Jackson car and Star Trek guitars, as well as fan-fretted and fretless models. There is also a Lindert baritone guitar, check out the thumbs-up logo.
Link: 1998 NAMM oddities at The Other Room