it still leaves me lukewarm to which option is the right one. Once you start on one track - you can't change.

I would still vote for a $99 or $199,- commercial license that covers the mobile platforms. :-) I would rather go that way - than end up finding out we start something on LGPL - and then need to something that only the commercial license can provide for. You might not even know before you have really learned QT - if it is the "right" platform or not.