There are A TON of new features coming in version 9. Big changes in usability overall.
You can access the beta as a registered customer or partner here: http://www.qlikcommunity.com/qv9beta/
My favorite new features so far:
iPhone client. Zoom in. Shake to clear. Lots of fun.
Java client for everyone else, including Blackberry.
Removal of the 2 billion record limit. Now your [...]