Yeah, maybe, but check this out:
Newegg.com - Computer Hardware,Hard Drives,Solid State Disks,PCI Express
600MB/s+! :)
I'm thinking about getting an 8GB SSD in SATA 2 configuration, or SATA 3 (6Gbps) when it comes out. This'd be great when I get an ASUS SATA3/USB3 PCIe adapter.