According to a roadmap leaked by a Swedish forum, the desktop version of Bulldozer comes by April. Engineering samples of Zambezi AM3+ CPU are expected in December 2010 and hopefully this has already happened.
Production candidate 32nm silicon should be ready by February 2011 and the CPU should be production ready by March 2011.
The launch should take place in April, which is the first month of Q2 2011. Many people expected this CPU at a later date, and this up to 8-core processor series might be something to get AMD much needed traction and attention.
The Scorpius platform also comes with AMD 990FX Northbridge that can take care of 2x16 PCIe Crossfire mode and it comes matched with SB950. The new SB950 southbridge supports Raid 5, 14 USB 2.0, 6 SATA ports at 6Gb/s as well as AMD overdrive. Unfortunately there is no native USB 3.0 support.
Scorpius also supports AMD 990X chipset with two 8X PCIe Crossfire capable slots, AMD 880G in AMD3+ version that has one 16X PCIe slot as well as integrated DX10.1 graphics card at 560MHz. The last chipset to support Scorpius needs is AMD 970 and this little one has only one PCIe16X slot, but the vast majority of people don't need more anyway.
The link to the roadmap is here.