SGS Carbon Fibre Case Mod
There have been carbon fibre case mods for many different devices, and here is one for the Samsung Galaxy S. The carbon fibre look is very popular and the most popular carbon fibre case mod appears to be one using 3M Carbon Fibre tape.
XDA forum member gfcpinto has performed this very mod on his SGS using simply the tape, a steady hand, some time and an hairdryer.
Not to be outdone, XDA forum member Vin_Thomas also performed the same mod and has provided further details on the dimensions of tape required and some tips on getting a precision install.
For more pictures and info, check out the modification thread.