I4U NEWS reviews the PNY IronKey 4GB Flash Drive.
 

If you are a user of flash drives for transporting data that is sensitive or personal in nature, you should consider an encrypting flash drive like the PNY IronKey 4GB flash drive we are testing today. Setting up the PNY IronKey 4GB flash drive is easy and when you first plug the drive into your USB port an onscreen menu pops up to prompt you to initialize the drive. This includes accepting a couple user agreements and choosing your password for the drive. The IronKey then generates the AES keys needed for encryption your data.