[Reto]

I like the Omnifocus ipad app. It is very expensive but i like it.

Nevertheless ootb interoperability and a OS/device independent way to manage my items is missing. (not speaking of outlook yet).

This and exactly this (in combination with the high price of the app which causes that I really have very high expectations towards omigroup) will most certainly result in the fact that i will migrate away from omnifocus to a more interopaerable, open (web and OS/device independent solution).

I think technically the basis is there to provide a service like toddledo and not just apps that backup on a remote server. But then it's really the decision of providing a service vs apps with backup 'only'.