After doing more research, I would recommend not installing this bios just yet. It seems that it runs much hotter and none of the new features seem to work.
I have not installed it thankfully.
I found out by installing it a few minutes ago (actually 45 mins). Nothing works yet and it's not stable at all. HD Controller problems (luckily I didn't try to boot into Windows NT) I think. The HD light wouldn't go out and it wouldn't re-boot.
Keep your eye out for the next rev though as Asus is usually pretty quick about getting problems fixed.
People with unlocked processors who are experienced with overclocking have reported that it doesn't work. It seems that after you unlock the processor, you have to change all the dip switches to off and then you should be able to change the processor speed in the bios.
But it doesn't work so far. But it is still beta.
I have two other Duron 650's running at 850 and 900 so don't assume anything. It's the BIOS problem. By the way, I just saw that there is an E version available. I will try it and let you know whether it's any better.
If anyone else wants to try, here is the link. ftp://ftp.asuscom.de/pub/ASUSCOM/BIOS/Socket_A/VIA_Chip...