[wilsonng]

The underlying database structure has not changed for OmniFocus 1 and 2. You will not need a new version of OmniFocus for iPad.

I have an old Core 2 Duo MacBook at home that can't run Mountain Lion and possibly can't run OmniFocus 2 either. I have a MacBook Pro at work that runs Mountain Lion and looks like it can use OmniFocus 2.

Because the database structure hasn't changed, it looks like I can use OmniPresence to sync my OmniFocus database to the cloud and then have it sync between OmniFocus 1 on my pre-Mountain Lion Mac at home and OmniFocus 2 on my Mountain Lion Mac at work.

I should also be able to use my current OmniFocus for iPhone and iPad to sync to that same database as well.

This sounds like this will be a seamless transition to the new version while maintaining compatibility with older versions. :-D