Installed 0.6 and installation went ok. Tried it out and I am quiete impressed with it so far. Locks phone straight away once message is received. You have to start the daemon after reboots or turning the phone off. This is a little bug which I will file but as long as you enable phone lock in N900 settings it asks you for unlock code when you switch it on anyway. Good application but use with caution while users test as a previous bug was quite major. big ups to developer