Had a spare one, the other one is in my pc. 
It gives:
Max Read: up to 525MB/s
Max Write: up to 500MB/s
against:
285MB/s, Write = 275MB/s of SATA2
You never know...with a pci SATA3 controller this thing would fly!
Sure OCZ are great. I have two Vertex 120GB ones in laptops, though I specifically got Vertex2 for the one that doesn't do SATA3, and Vertex3 for the newer laptop that does.
The only issue with the Sandforce chipset is that it slows down to about 50% performance when using crypto (the controller gets some of the performance by compressing/decompressing data on the fly and encrypted bitstream doesn't compress well -> performance loss).
