command line control switches
 

A REALLY useful feature would be command line control switches. That way you could run "winamp.exe /b" and it would go to the next track. Their are multiple uses for this, in particular it will help owners of multimedia keyboards program keys to control winamp, and make it easy to control winamp from other programs, and allow you to set up executable scripts that can control winamp. Plus, it don't think it would take much to add that feature to winamp, as it is a pretty standard feature among many other programs.