If you read the PDF, it says "At Supercomputing 2005, Sun announced significant performance upgrades to its Sun Fire x64 servers powered by the high-performance AMD Opteron processor. The Sun Fire X4100 and Sun Fire X4200 servers are now available with AMD's newest, highest-performing multi-core AMD Opteron Model 285 SE processor, outperforming similar competitors' systems based on dual-core Intel processors." for the November 15 2005 entry.
I didn't catch that announcement, nor did anyone I asked, odd isn't it? Either way, the 'high wattage' parts tend to precede the normal non-SE parts by a handful of weeks, so I would look for the 285s to ship in early January or so. If it wasn't for a sharp eyed reader, we might have been surprised by this. µ