Promise have just released a new generation of "SuperTrak EX" and "FastTrak TX" host-based SAS RAID controllers into their lineup which support up to RAID 5/6 and use the PCIe interface.
You can obtain full details on each of the new models available within the announcement here folks.
Promise's SuperTrak EX offerings are 4- and 8-port internal, hardware-based SAS and SATA RAID controllers using Intel's 81348 IO processor. They support RAID 5 and RAID 6 and are designed for data protection needs based on entry-level and midrange server platforms running all popular Linux distributions as well as Windows. Target applications include disk-to-disk backup, video capture, post production and database applications. Additional models of the SuperTrak EX family are expected to ship by the end of the quarter.