I would just like to state a a fact that most articles have missed:
TRIM in Lion beta is only for Apple SSD.
This patch works in Lion beta to add support for all SSD’s. So unless Apple changes anything, this patch will become really useful in the future and not just a way to get TRIM a couple of months earlier right now. I hope though that this patch proves to everyone that it is simple to add TRIM support for any brand of SSD and that it will put pressure on Apple on removing their “Apple SSD only” restriction for TRIM in Lion.