I have not tried out Pointsec yet, but its a solution my company sells so I should learn it :) I certified myself in PGP, which unfortunately does not support full disk encryption on Linux, just Windows and soon OSX... It also does not support dual boot on Windows. (its a shim into ntloader - but after the actual boot loader the 'pgp' os which asks for the decryption key during boot is linux, so I KNOW they have linux expertise...)

I kind of like the roll your own approach to the Linux full disk encryption scenario, but most large organizations balk at anything thats not a commercial solution