Version:           1.0.1 (using KDE 3.2.3, Gentoo)
Compiler:          gcc version 3.3.3 20040412 (Gentoo Linux 3.3.3-r6, ssp-3.3.2-2, pie-8.7.6)
OS:                Linux (i686) release 2.6.7-win4lin-r4

I have one setup where the mouse is rarely used but the keyboard instead.

so two additions I was thinking of is

1) from a collection listing, [Enter] (definable) will recursively select items, just like d&d does now.

2) with a collection listing and a song listing the tab does not cycle between them but stay with the collection listing