Ok ... I think the BusBoat and certainly the Cosmic Muffin have me beat here; and technically this is a cat, but it IS sail-powered.
I actually looked this up just now in response to this thread. In Wilmington (Los Angeles Harbor, CA), at a neighboring marina, there is a boat that has been on the hard near Newmarks / Pacific Yacht / whatever over at the end of the spit out there, in front of one of the marina offices. It is a twin hull cat, whose width is impossibly narrow given the length of the hulls and the un-stepped mast. I have concluded that it must be in "trailer" configuration because there is simply no way the thing would be laterally stable otherwise.
EDIT: according to this link, they do indeed shrink down from 14' beam to 8' for trailering:
http://sailingtexas.com/201101/sstiletto27100.html
Anyway here you go, it's called a Stiletto and evidently they are around. I've never seen any other example except this one - never seen one in the water.
http://www.stilettocatamarans.com/stiletto_27_gt_spec.htm
I've attached a couple of pictures. I will have to take one of the example near our marina, the next time I am down there.
I think it's the jet fighter tinted canopy things that really make this an odd in my eye. Check out the interior shots! Very strange configuration if you ask me.
Interior shot:
Here's an unfortunate fellow with a capsized Stiletto (love the file name on this one, BTW):
EDIT: the file name ended with "also_not_me"