Here is something interesting for you guys to read....

AMI has released a new bios that checks its integrity via a special chip

As soon as the PC powers on, AMIBIOS starts a fairly complex process. The BIOS boot block addresses the TPM chip that verifies the BIOS authenticity itself. Then BIOS proceeds to verify the authenticity and integrity of the OS loader and OS kernel.
The official announcement can be found here: http://www.ami.com/ami/showpress.cfm?PrID=118