According to AMD, the Opteron 8222 SE and 2222 SE chips are already available "in several platform configurations today from tier one OEMs." Those OEMs, or system vendors, include the usual suspects: AMD server partners HP, IBM, Sun, and Dell. Official pricing for the Opteron 8222 SE is $2,149 per chip; the Opteron 2222 SE costs $873. The former can work in systems with as many as eight other chips, while the 2222 SE is limited to dual-processor configurations.
As an aside, AMD mentions in its announcement that it has updated performance projections for its upcoming "Barcelona" quad-core processors. The projections are based on the SPECcpu2006 benchmark, and they supposedly predict that AMD will have "up to a 50 percent advantage in floating point performance and 20 percent in integer performance over the competition's highest-performing quad-core processor at the same frequency."