Can iWork '09 - Serial Number Key work with iWork '08?

Dosn't it have an option within work '08 progam to activate? Did when I looked last year.

 

The page where you could purchase an iWork '08 license key no longer exists, and the link in Buy option in iWork '08 on first launch redirects to the page to purchase an electronic license for iWork '09. And no, a key for one version will not work on another. If you haven't already paid money, just go for iWork '09, and you can also go for the electronic activation after downloading the trial from here. iWork '09 has everything '08 has and more, including password protection of files and some added effects/animations/features.

 

Purchase '09 unless you really need something in '08 that wasn't in '09. And you can download the trial of '09 and use the serial to activate that.