Express Card and PCI Express eSATA add-ons

Greenhouse has come out with two new products that allow you to add eSATA to your laptop or desktop PC so you can run external hard drives faster than over USB.

The GH-ESC-ESA2 has 2 eSATA slots that transfer data at up to 3GB/sec (much faster than USB or firewire), and it supports RAID 0/1.

source