Anyone know if it's a Harvard Diploma/Certificate that you get? I'm guessing it's probably not.

I doubt it, and the certificate isn't free:

    PDF Certificate: € 21
    Certificate Parchment: € 27
    Framed Certificate Parchment: € 37
    Diploma Parchment: € 96
    Framed Diploma: € 115

Also - you need to enable Flash to be able to do the final assessment.