Amidst all the craziness going on with iPad development, this version of OmniGraffle got pushed to the wayside a wee tad, we've basically been ready to go final with it but kept delaying the release in order to work on that other OmniGraffle project.
To sum up (for those of you who may not have been keeping up with the beta releases), we've added some preferences to disable the Multi-Touch trackpad gestures, as well as some preferences for dealing with momentum scrolling if you're using a Magic Mouse, and fixed a fair number of bugs associated with shared layers and Mac OS X 10.6 "Snow Leopard".
You can find the disk images to download at our newly-revamped downloads page, and read up at the historical release notes page.