Which version of iWork can I use on OS X 10.6.3? I have OS X 10.6.3 installed on my iMac. 

I would like to download a trial version of iWork but the latest version (9.1) is not compatible with my OS X version. 

Which is the right version of iWork for me and where could I download the trial version?
According to Apple's iWork system requirements page, you should be able to download this trial version.