Well, after a lengthy beta testing period, OmniGraffle 5.0 and OmniGraffle Professional 5.0 are now released in final form, we'd like to thank all of the beta testers for their feedback, and I hope we didn't scare too many folks with the lack of a built-in license key in the release candidate.
OmniGraffle 5 is currently available for purchase at the Omni Store. It's $99.95, and upgrades from earlier versions of OmniGraffle are $39.95. OmniGraffle Professional 5 is $199.95, and upgrades from earlier versions of OmniGraffle are $74.95. You can find out more pricing and upgrade information at the store.
Operating System Requirements
OmniGraffle 5 and OmniGraffle Professional 5 require Mac OS X 10.5 (Leopard) or later to run.