There's a lot of outliners for Android, but non of them has a conduit to sync with a desktop version of the same program. IQ may be the first, and then the best outliner in the world!!
Applications like this one will not be viable without mobility option. Please realize that. Less talented developers with much worse products have seen it long time ago. (Look at the primitive and overpriced offers of the Android market!) "Cloud market" is also heading to crash soon as the next "balloon" of the world economy, so a local-synced mobile version would simply "rock". I think no one would even mind to pay a "few bucks" for a good mobile app. That would finance, motivate and reward your development - that you deserve, I'm sure.