1) Multiple scrolling lists per page. This should be supported on a T4 since there is so much real estate. For example you can have 5 different lists of channels separated by Genre. You then can scroll up or down each Genere list to select the chanel you want. This would allow you to put almost all of your channels sorted by type on one page.
2) Also for the T4, Horizontal scrolling lists. This way you can create a horizonal banner across the top of each page to scroll a pick sources. This is also another reason to have multiple scroll lists per page. You may have a horizonal scroll bar across the top for sources and want to use a vertical scrol for another purpose.
3) The ability to sort by a particular column, besides disk number but not display its contents in the scrolling lists. I.e. put source names or Station names in the Album field and sort by that field but just show the bitmap button only in the list. I don't think this is possible today.