Phoronix has Linux benchmark results of AMD's A8-3500M Fusion APU, you can check it out over here.
"Earlier this week we delivered launch-day Linux benchmarks of
the AMD A8-3500M "Llano" Fusion APU. The results for this
next-generation, quad-core Fusion chip were impressive with the graphics
and compute power being several times faster than the common AMD E-350
Fusion APU. In that article we just had two other systems the A8-3500M
performance was being compared to, but here are some more Linux
benchmarks comparing Llano to other systems running Ubuntu 11.04."