QT works well for a lot of apps but there are certain classes of apps where QT doesn't really lighten the load all that much. Especially with any custom UI, there are a lot of little platform-specific quirks, which is a problem we're very familiar with. On the back-end, things like realtime processing (necessary for filling the audio buffer) or working with the filesystem are fundamentally not helped by QT.

We're definitely not pulling the app altogether. When MeeGo is ready we'd like to be a part of that. In the mean time, we'll also be launching on Android, Mac, Windows and Linux all in the immediate future.