Here in Canada, AMEX Canada offers these two cards:

Aeroplan Plus Platinum Card
$399 annual fee (includes free Supplementary Gold Cards)
$175 annual fee for each Supplementary Platinum Card

And plain-old Platinum Card (same fees,of course the fees are in CDN.)

Edited: I found it: it's the "normal" Platinum card which has the "Cruise Privileges" benefit, but I don't see it with the Aeroplan Platinum.

If you cruise more than once a year, it's a great deal, if you only cruise once a year, you have to study the rest of the benefits to see if it's worth it.