I use PearPC to see how my webpages look in Safari & IE Mac.
To get networking running reliabily (including after PearPC restarts), the only stable combo I could find seven months ago was running PearPC 0.2 with OpenVPN 2.0 beta 2 and the RTL8139 network card emulator.
I've upgraded to the 0.4 release and have it working with OpenVPN 1.05 with the RTL8139 network card emulator and running OS X 10.3. It's running very nicely, seemingly with greatly reduced CPU usage at idle. I don't need to shut PearPC down when I want to run something CPU intensive.
Thank you very much to the PearPC developers for their excellent work!
You should have seen my clients' faces when I started up "my Mac" and on my Intel laptop a few months back and demo'd my web software in Safari!