What kind of guitar thread?
My current next door neighbor collects guitars. He mounts them on his walls.
He has about 30 guitars of all types.
Stringed instruments range from Ukelele to cello and also includes pianos, harps and specialized native culture constructs. There's also a wide range of custom configurations which produce a wide range of sound from sub-sonic to ultrahigh frequency.
Personally, enjoying blues guitar, I've often wondered how the great blues guitarists would play a Moog Guitar with infinite sustain?
Animusic 2 features a stringed instrument which combines multiple stringed instuments into one unit. It would be insanely complicated to play.
Cullum Graham plays a Harp Guitar.
Calum Graham "The Nomad Harp Guitar" à La Chapelle
http://www.youtube.com/watch?v=5QxShruMVmY
Phil Keaggy uses his guitars along with looping to play as a 'one-man band'.
Phil Keaggy - "Salvation Army Band" (On The Ph'lip Side)
http://www.youtube.com/watch?v=1c5ba3QqSXA
He demo'ed the Moog Guitar.
Gospel musician now, he wasn't always gosple.
Check This Out...
Seasick Steve plays a 'one-string' guitar.
Seasick Steve 1 string diddley bo'
http://www.youtube.com/watch?v=TbefIwp5LoQ
There's also cigar box guitars & oil can guitars.
Nice thread idea!