I just upgraded my OmniOutliner license to OmniOutliner Pro 3.0 - what an awesome upgrade. I just did a quick outline file to use as a "project dashboard" for the APOLLO project. This is something I had done in hand-rolled HTML on other projects, but here, I get a beautiful, dynamic, standards-compliant outline that I can edit as part of my regular workflow, so I'm much more likely to keep it up to date...
Nice work, OmniGroup!