I sent a client and his team overseas yesterday with an easy disk encryption set up that was free from these guys:

http://www.truecrypt.org/faq

Hardcore stuff too. This from their FAQ

TrueCrypt does not contain any mechanism or facility that would allow partial or complete recovery of your encrypted data without knowing the correct password or the key used to encrypt the data. The only way to recover your files is to try to "crack" the password or the key, but it could take thousands or millions of years depending on the length and quality of the password/keyfiles, on software/hardware efficiency, and other factors.