Composite bike frame in your garage.....

http://www.sheldonbrown.com/rinard/carbon_fiber.htm

he used to have TONS more info and pics on that project, including destructive testing pics.
Wonder if there is another site for that?

Speaking of home-brew carbon bikes, does anyone know what became of the Finnish dudes site that used to be at: http://www.kolumbus.fi/signature/cf.htm

It was quite impressive as he not only made an aero frame, but also seatpost/saddle combos, one-piece aero bars, and assorted bits and pieces. Was very cool.