If you have a SSD drive, you might know that TRIM is not available for Mac OSX.
In recent OS versions for Macbook Pro 2011 though, and in Lion, there is support for TRIM. But only on Apple SSD brand!
So I made this patch to enable TRIM for any SSD in Snow Leopard!
Some users have even reported that it is working in Lion beta!
Here you go, TRIM Support Enabler for Snow Leopard: