Originally Posted by SchreiberBike
The really cool folks use part of an old chain (drive chain, like between your cranks and your cogs). Shorten it with a chain tool so that it's just long enough to go between your saddle rails and your seat stays. Then put it inside a bit of old inner tube and using a chain tool, close it up again.
Looks cool to me at least.
I do this on my commuter, which stays locked outside during the workday... but I bet the weight weenies would hate the idea
-chris