A couple years ago, I wrote a guide for using SSH for secure connections on OS X. Creating SSH tunnels for SOCKS proxying is still my preferred way of securing my communications on public wifi networks, and with ETech and SXSW, I've had to get these up and running again. Since last year. The only big change to my setup is that I'm now running Firefox 3. Like with Keyconfig, neither QuickProxy or SwitchProxy have been updated, so I went and modified the install.rdf to make it compatible. Here's a copy in case anyone finds it useful: switchproxy.xpi.