The new update to the Acer Aspire 4540 is out.
It runs the first Mobile Phenom Quad Core N930 in the highest SKU version.
How hot it might get when coupled with the Radeon 5650HD I don't know, but personally I feel it will get really hot and power hungry so decide carefully what are your needs before purchasing it.
More Information about the new Processors here.
Users who bought this laptop might want to undervolt the processor to conserve power and reduce thermal output.
Expect the new Acer Aspire 45XX series which are emerging to have the same characteristics.