A new Intel chipset roadmap was published by Expreview. The chart shows the X58 and G41 chipsets will be available in Q4 2008 but for the Ibex Peak you'll have to wait until Q3 2009:
Different from the Bloomfield mobo X58 we already know, the Ipex Peak platform will only use Lynnfield CPU, because it uses LGA 1160 socket.
Similar to Bloomfield, Lynnfield is a native quad core CPU, supports SMT (Simultaneous Multi-Threading), has 8MB Shared Cache. The main difference is Lynnfield will only supports Dual Channel DDR3, and Bloomfield supports Tri Channel. What’s more, Lynnfield have PCI Express interconnection inside, make it totally supports PCIe 2.0 X16, or dual PCIe 2.0 x8 crossfire.
X58 features Quick Path Interconnect, but Ibex Peak doesn’t. Ibex Peak will only use the old DMI (Direct Media Interface) link, peak speed will be 2GT/s, which is totally enough for southbridge connection.