The newly released iWorks '08 is gaining in functionality. The addition of a spreadsheet program is fantastic.
I perused the documentation available so far for the word processor Pages and could find no reference to advancements in Unicode support, particularly pertaining to Right-to-Left Hebrew Unicode support. It is possible there could be improvements without it being a touted feature. But I doubt it.
Update: You can look at the tutorials here: www.apple.com/iwork/tutorials/