According to this article over at Reg Hardware today, seems NVIDIA are working on a mobile variant of their upcoming IGP based MCP61 chipset for the AMD Socket AM2 platform, coming to a future notebook near you.

There's also some brief specs of the upcoming desktop MCP61 versions mentioned in the article.

Nvidia's upcoming single-chip integrated chipset for AMD's Socket AM2 CPUs, the MCP61, will be offered in a form suitable for notebook use in addition to the desktop versions the chipset is already expected to ship as, motherboard-maker moles have claimed.

The whispers - cited by DigiTimes - also point to an August debut for the MCP61S, one of three MCP61 desktop variants Nvidia is believed to be preparing. The claims echo alleged leaked roadmap details reported as far back as April this year.