Adding a place to put the CD number for album wich have more than one would be great. This would permit to have mp3 named cd num - track num - title...
By the way, did you know that SharpDevelop can do most of what MS-Visual Studio can do in C# and VB.Net ? Plus, it's easilly portable to Linux with the Mono framework.
Lastly, keep ut the good work. I dont use last version of CDex because there's some bugs for me but maybe next one will be better.