Well, if the performance becomes lousy, I can always just pop it into the ide-usb adapter and run a garbage collector style mass trim on it. I couldn't find the drive controller info for this model.

It also appears that apple is only recently including support for TRIM in 10.6.6/7 and Lion, so it will be a while before(assuming we ever do) get any sort of third party(read:hacked) TRIM support in os 9.