I am looking to give the fixed gear thing a good trial, after having a chance to take a spin on a fixie briefly in a parking lot (kinda liked the feeling). I saw on 63xc.com an article on converting a disk hub to fixed gear by bolting a cog to the disk mount and turning the wheel around. Are there any pitfalls with doing this (i.e. stresses on the mount, chainline, etc...). The bike is currently a singlespeed, so I believe the hub is already reasonably centered. Also, the bike has an EBB, so I do have a way of tensioning the chain, plus I could adjust the chainline a couple of mm either way at the BB.
I would like to try fixed gear as inexpensively as possible.