I have in our school 700 Ipads and we are using Profile Manager with Mac Mini Lion Server which comes with when you buy Mac Mini Lion Server.
Apart from that in my Imac we use Apple Configurator to prepare the IPads and using it to Restore Points in order to have all Ipads looking the same almost like a image backup.
this allow us to enroll all IPads (final stage). After doing the update for the Apple Configurator we realise that by doing a test and enrolling an iPad it shows in Profile Manager as a "New Device" and not with as it should e.g. " LS12348 " . Do you know how we can see the IPad number?