Sorry for the relative quiet on our part! We use OmniOutliner heavily ourselves, and we're as eager as you are to see OmniOutliner 4.
Over the past few years, we've done quite a lot of work on the OmniOutliner engine as part of the work we've done on OmniPlan and OmniFocus, and if you take a close look at those products you'll see several of the improvements we're planning to bring back to OmniOutliner:
- Different rows can have different sets of columns. (You can see this in OmniFocus if you examine rows which represent different types of items, e.g. projects vs. actions.)
- Columns can be hidden. (Both OmniPlan and OmniFocus support this.)
- Multiple windows can be opened on the same document. (OmniFocus does this.)
- Views can be filtered based on multiple criteria, and you can print your filtered view. (OmniPlan 1.5 does this.)
- Documents can have multiple saved view perspectives that you can quickly select or print. (OmniFocus does this.)
- Popup columns support "Smart Match" completion for quick keyboard input. (OmniFocus does this.)
Of course, we're also giving the UI a facelift, and we're hoping to add a few other frequently-requested features as well. (Zoomed editing, anyone?)
So, again, let me apologize for the relative quiet on our end! We've been busy improving things in the engine, but we still have some work to do to make those improvements available to the user.
(And yes, it's also true that we do have a lot of other projects going on as well—and this month's release of the iPhone SDK probably won't help matters any! If you know any software developers that might be interested in working for a small software company in Seattle, please
send them our way.)