Thanks everyone for a good discussion.

The IronKey Enterprise edition has also recently been released. It allows enterprise administrators to recover locked devices, to customize the password strength and self-destruct policies, to manage devices centrally, and to configure which software applications are available on the devices.

One difference between the IronKey AES encryption and that of others like SanDisk is that IronKey uses the correct mode of AES for large block encryption - cipher-block chaining (CBC).  SanDisk uses Electronic Code Book (ECB) which is not designed for blocks of data larger than about 32 bytes.  Here is a wikipedia entry that discusses the algorithmic differences and has some cool images to show the encryption differences.

http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation