Looks like there are four versions of the new CK8-04 chipset, according to an anonymous Russian source cited by a French web site. The next-generation AMD64-oriented chipset line will ship in both standard and Ultra versions. There will also be a Pro release and an SLI release, which surely has something to do with SLI through PCI Express x16. Other cool features will probably include Gigabyte Ethernet and a hardware firewall.
More to read on this here, and here.