I found a simple two step process to transparently circumvent any website access ban for non-password protected sites.

1. Install Google Web Accelerator.
2. Restart your browser.

That's it. Now enjoy any site that you want to browse, ban or no ban. Additionally you are likely to see some speedup on broadband connections.

The catch: Now Google knows your browsing habits and the sites you visit. You can ask Google not to accelerate certain sites. And you can trust Google's - Don't be evil policy.