When you have a large list of artists or albums, scrolling to the one you want becomes awkward. A method of indexing similar to Windows Phone would speed this up and make it a lot easier.
I've mocked up some screenshots to illustrate how this might work.
In the main list you have alphabetic indicators showing you where you are:
If you then click one of these index letters you get an alphabet list
Clicking any of the letters takes you to that grouping on the artist/album list. An enhancement to this would be to dim letters where you have no entry.
This method works well on Windows Phone and could enhance the artists and album lists in Rune.