Here is how to set up Unifi for Ubuntu Linux (Lucid Lynx).
You will need:
Click on the Network Manager icon to open a list of available networks. Select the "Unifi" network from the list.
A dialog titled "Authentication required by wireless network" should appear.
Ensure you enter the following details:
A dialog titled "No Certificate Authority certificate chosen"should appear. Click "Ignore".
After a few seconds a notification should appear saying that the connection was successfully established.
You are now successfully connected to Unifi