DailyTech's got the leaked details on the upcoming nVidia chipsets for AM2 & Conroe. Stuff like increased bandwidth between GPU & MCP for nVidia-only components, & QoS for their built-in firewall.

"The nForce 590 is a two chip package. The SPP uses 90nm TSMC packaging while the MCP is a 130nm TSMC package. Other MCP55 will use similar setups, but will not 'relaunch' until later this year."