AMD's Barcelona processor should arrive by the middle of the year, and a couple of months later we can already expect a successor called Budapest.
While the Barcelona chip still uses HyperTransport 2.0, the Budapest CPU will feature HyperTransport 3.0. According to FUD Zilla the Budapest processors are slated to arrive by the end of the third quarter or in the fourth quarter of this year.
Besides being the capital of Hungary, Budapest will be a Socket AM2+ processor that will fit on Opteron and Quad FX motherboards.
HyperTransport 3.0 will boost the maximum clock speed from 1.4GHz to 2.6GHz with 32-bit links, increasing the bandwidth from 22.4GB/s to 41.6GB/s.