i dunno what hamachi is, but you can use ssh to make some tunnels...

Assuming you already have the xterm emulator installed:

1) add the repository with openSSH into your application manager's catalog. For 770 users this would be according to the following information:

[you can also do this through the command line by editing sources.list wherever that is, i can't remember off the top of my head]

2) open the xterm, get to root (you should be able to jsut run "sudo gainroot" but you might need to install that 'becomeroot' program, just look in the app catalog at maemo.org to find that)

3) type "apt-get install ssh" and that should do it. Then you should log out of root and as user you can do ssh -L or -R or -D or whatever to get your tunnels / proxies.