I've known for some time that non-VPN use of an open hot spot (WiFi) service means anyone who wants to can read what I'm doing -- including passwords, etc. I've looked on occasion for a service that would provide me a personal VPN channel, but I couldn't find one.
What's weird is I just found one, mentioned obliquely in a NYT article on this problem. Why didn't it ever show up in my Google searches? Weird.
Anyway, HotSpotVPN is one of those services. It's $90/year, so not incredibly cheap. Supports OS X 10.4 but not 10.3.