iWork's Pages and Keynote are less that completely usable for scientists for one simple reason; unlike Microsoft Office, there is no equation editor. My documents and talks always contain equations in one form or other.
I had always assumed that sometime like an equation editor would be too expensive to be included within iWork. iWork is priced at a remarkably low cost (well done Apple!), and Microsoft license their equation editor from a third party. So an equation editor for iWork seemed out of the question.
But then I discovered that Apple's Grapher application has more than the basis of a decent equation editor. It lacks the h-bar symbol, and one or two other things, but in most respects it is almost suitable for inclusion within the iWorks apps.
So will an equation editor feature in iWork 09? Pity about not making it into 08; it could have been in there.