Ask HN: How do you secure yourself on public WiFi?

Following on from the FireSheep post (http://news.ycombinator.com/item?id=1827928) how do HNers secure their InterWebs usage whilst on Public WiFi ?

It seems like VPN is a good way to go - I'm particularly interested to hear whether anyone can recommend any good VPN providers ?

The following were mentioned in the FireSheep post:

  WiTopia (http://www.witopia.net)
  OpenVPN (http://openvpn.net/)

Does anyone have any experience with them or others ?