I stumbled across an excellent article on freenode #security. Does your employer use content filtering? Are you sick of being restricted when using free wifi hotspots? How about a hotel charging for wifi?
The article talks about methods to circumvent all of the above scenarios. I actually do the most vanilla technique to overcome my employer’s web filter: dynamic ssh tunneling back to a server I have running at home.
Read it here: http://blog.sebastien.raveau.name/2009/06/internet-by-all-means.html