AMD has been quite friendly towards the Coreboot project
(what used to be LinuxBIOS) with releasing support for new chipsets
and other engineering assistance. This support has not dried up at all but has only expanded with AMD's recent release of Coreboot code to support the Embedded G-Series Fusion processor.
Patches from AMD began back in February
and they have blogged about the work here
Marc Jones, a Coreboot developer at Sage Electronic Engineering, was involved with this latest AMD code release and he writes to Phoronix: "The release includes support for the Embedded G-Series Fusion processor (fam14 and sb800). It also included Fam10 code, which coreboot already had some support for. AMD has really stepped it up this time. The code is the same code that BIOS vendors get, and not a port or limited support that coreboot has received from AMD in the past."
Have you started (or tried) using Coreboot yet? Share your successes and failures in our forums.