"Quite fast, quiet and power efficient. SD26 firmware"4.0 starson by danwat1234
Pros: It is power efficient, quiet and performs very well
Cons: Not as fast as a full blown SSD and speed is not consistent. It depends on whether the data you want is on the 4GB NAND flash or not.
Summary: Here is the official Seagate Momentus XT SD26 firmware update. SD26 is the latest version of the drive's firmware as of the end of August, 2011.
Windows version (easiest):
Bootable iso version: