Torpark
For those of you running Firefox, the Torpark browser (up to version 2.0.0.3) is free. It's a proxied Firefox, and I've been able to run it on pretty much any network. Past v2.0.0.3 I believe it's been rebranded to
XeroBank XB Browser, though I've not played with that.
When my previous employer's IT dept decided to start blocking politically conservative blogs (while claiming they weren't), I found that Torpark allowed me access to pretty much whatever.
Yes, you give up some performance, but you don't leave breadcrumbs everywhere, and you can get to wherever you need to go.
Like here.
(Oh, and for those of you NOT running Firefox -- specifically those of you still running IE -- why would you do that to yourself? I run Opera as a rule, Firefox for stuff that Opera doesn't handle right, and IE only when I must.
I lock my car when it's parked, I don't leave it idling when I shop, I lock my (home) doors at night, I don't leave guns on my coffee table with the blinds open, and I don't run IE without a really good reason.)