I've been doing some benchmarking of qemu-arm, and thought I'd share the 
results.  Tests were run on an Opteron 246(2Ghz) rinning in 32-bit mode, and 
on an armv6 cpu with vfp coprocessor. I'm not sure what speed teh arm cpu 
runs at, but suspect it's 100-200MHz.
Configurations tested were as follows:

* native-x86 - native x86
* qemu-arm (fpa) - hard-float for the FPA coprocessor.
* qemu-arm (soft+vfp) - hard-float for VFP coprocessor, but still using 
soft-float ABI+libraries.  This may explain the poor FOURIER scores (sin and 
cos are still soft-float)
* native-arm (soft+vfp) - The same binary run on arm hardware.
* qemu-arm (soft) - Full soft-float.
* native-arm (soft) - same binary run on arm hardware.

Paul