Transformer Prime, VPN and password protection
Found this, it's a hack but it works for on my galaxy nexus 2.1.2
Here's the steps:


Set your lock screen security to what you want, slide/none
Go to create VPN profile
Create a pattern lock
Setup VPN profile
Lock device
Unlock but input the wrong pattern until device locks for 30.
Tap "Forgotten Pattern"
Enter your google account details.
Cancel the "Screen Security" page
Now device will unlock without pattern requirement


Source: Connecting to VPN forces having secure screen lock