Ah thats a shame, just finished assigning out our first patch of 150 enterprise ironkeys.Sadly not ironkey, using Sanctuary (or whatever it's called now, 'Lumension Device Control') to encrypt and control USB stuffs.
in a previous job, we used this on the laptops and it used central administration
http://www.checkpoint.com/pointsec/
I've just got a quote for that from one of our resellers. Coming in a lot cheaper then everything else at the moment!