Eleuthria,
I would be willing to donate a little more if we could indeed tunnel through SSH on the standard SSH port. That port is not blocked at my office firewall, and securing the traffic would be awesome. Right now, ports 8332 is blocked at work, and I was going to have to figure out a way of setting squid proxy on my co-located web server to get traffic to BTCGuild.
Just create your own SSH tunnel to a machine on your home network. Then setup a port forwarded [tunneled through SSH] to btcguild.com:8332 and make it localhost:8332. Point your miners at 127.0.0.1 instead of btcguild.com and you are ready to go. You don't need a service for this.