Hey maybe apt... Debian's repos. There is a "store", a very old and successful one that has a few Qt apps, will that do it for you?
Qt is working full steam on Symbian^3, Maemo 5 and even older Symbian phones. (not sure what version, but it includes 5800 and others). I don't know how many developers have already released Qt apps, but it's all there, ready to work.
So, for all effects in this debate, Qt is actually "new".
The often mentioned tradition and adoption is more of a rhetoric thing. Qt development for mass mobile apps only really exists and is being tested right now, because of Nokia's relatively recent push. ...Is good technology waiting to be used.
So KISS my Qt!!! Qt is beautiful, Qt is life, Qt is love! Simple and powerful.
Multi-platform development is always complicated, that is the truth. If there were no problems, it would be the same platform. Qt does offer a great means to archieve that, but it's not just about that. And also, have in mind that we are talking multi-platform across mobile/desktop etc. But maybe it could turn out Qt only really grows for handelds, who knows! :P
You are talking like Nokia was forcing you to always take care of numerous different platforms, that doens't make any sense.