Ahh gotcha. I am in a similar boat as well, I'm upgrading from a gd70 790fx / 720BE. I was considering the same exact setup as you (replace 720BE with 960T), or go with 970A mobo + 960T and wait for PD. I'm fascinated with Llano even though its end of life, and its something different... so I've settled on this.
As far as the 133MHz divider, it may be something strange like 125-132MHz , no boot, 133MHz+ boot. New BIOS may certainly help, but there just isnt a whole lot of info out there. Not many people into LLano because its not really any better than Phenom II, and plus you have to deal these quirky issues after you change the BCLK. Check out some of these articles:
133MHz Dividers, tips, etc. http://www.overclockers.com/overcloc...mds-llano-apu/
Stilts own findings: http://hwbot.org/forum/showthread.php?t=29770
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