If you're that determined to get around it, you could probably run your browser through a proxy, though I don't know if websense can work around that route or not. You could try something like
www.anonymizer.com
Another route you could probably take is just to browse 2+2 on your home pc, using Remote Desktop.
I'd advise you just sucked it up though, reading 2+2 during the day isn't worth getting fired over.