Since some of you might be interested in this.. here's a little HowTo

In order to automatically connect to a VPN when you connect your N9(50) to a wifi network you need to...

1.) install VPN9C (graphical frontend for vpnc on meego harmattan)

you can get it form the store.
(note that with vpnc you can only connect to VPN using IPSec)

2.) create a config file for vpnc (contains all the necesary credentials)

create a .conf file and store it somewhere
It should look somehting like this

3.) install Profilematic and create a new rule

choose your desired wifi network as a condition for the rule

to connect to VPN use this command

to disconnect from VPN once you disconnect from wifi


have fun!