The existing symbian apps would have to be re-written in Qt first, they won't just magically run now the n899 has Qt 4.6. It's a matter of getting devs to install and use the latest Qt sdk, open their existing application projects and spend time to port them to use it, and then compile and release a Maemo version. They may not be interested in doing that if they feel the Maemo userbase is insignifigant. A large percentage of Symbian apps are Java, and they will probably not be ported, along with those apps that rely on certain things like a digital compass or whatever. So it!s not just as plain sailing as all that.