While everyone is still busy talking about Barcelona, a server CPU I believe that we should take more attention to a desktop part called Budapest. Most of us don't buy servers every day but we tend to change our desktop hardware quite a lot.
Budapest, a desktop version of AMD's native Quad core will work on an AM2+ socket. It won't be exclusive to socket 1207 only, as many originally believed. The CPU will end up with 2MB dedicated L2 cache and additional 2MB shared L3 cache.
The new socket supports Hyper transport 3 and interconnection speeds of more than 4000 MHz or twice as fast as the current Hypertransport 1. The only difference between AM2+ version of Budapest and the socket 1207 is that the first one doesn't supports dual socket machine aka Quad FX.
The rest should be the same but AMD might tweak the speeds to differentiate the products.