In case you don't know it yet, we've just released Amarok 2.7! This release is called A Minor Tune, partially because the list of new features isn't pages-long (but you still get statistics synchronization and preliminary Nepomuk integration). But I believe it will be remembered for its level of polish and stability - many components like audio CD playback and file browser have been made much more solid, and the number of user-reported problems that were closed since 2.6 approaches stunning 500.
On the other hand, due to the lack of manpower there are still components that deserve much more love than they currently get. One such example is the MTP player plug-in, but don't fear, we (or I) have plans with it. Contributions in any form (patches being best) are of course more than welcome.