My board, the ASUS A7V supports up to 8 devices -- 4 devices on the ATA 100 Promise controller (onboard) and 4 devices on the ATA66 VIA controller.
Its a socket A, 100/200 mhz FSB with the Kt133 chipset, blah, blah, blah. With the latest BIOS it supports up to a 1.4ghz Athlon (as long as its an AthlonB with the 100/200 bus)