From a post I made to Apple Discussions. It may be deleted as it may be contrary to Apple's restrictive posting policy.
Pages is not scriptable. Keynote is not scriptable either.
I was interested in buying iWorks until I learned this. On the plus side both apps have an XML file format and the Keynote spec has been published (AXML). That's very good.
But what's the story with AppleScript? Has Apple decided to replace it with something else?
It's worth noting that iTunes/Windows lacks iTunes/Mac functionality because it doesn't have a scripting solution. I wonder if Apple is considering a cross-platform replacement for AppleScript. If so they may have decided not to invest in AppleScript support for iWorks.
If they're not planning to replace AppleScript, them I'm completely at a loss to explain why their premier desktop productivity software would not be scriptable.