Is there any chance that my Mac Mini, Model MB138D/A, would help you in shortening compile time (either because it's faster than your current machine or because you could offload parts of the job to it)?
Probably not, the hardware specifications don't look too good. :( My machine has a 3GHz C2D with 8GB RAM, compared to this the 1GB RAM of your Mac Mini sounds like constant swapping.
Then again, I'm currently using 8GB RAM + 7.9GB swap on my MBP, so who knows. We could run a qt build on your Mac Mini, if you give me SSH access and see how it turns out.
Best regards,
Mihai