I don't even know what that is. The only thing I need to do besides listen to songs is to search for a specific song. I don't know about Winamp, but on XMMS it's just a matter of pressing "j" then typing all or part of the name. I don't need any other functionality.
Neither do I, but I like the additional functionality that Winamp provides. The Media library has several different search functions (plus a bunch of automatically generated lists that are sometimes handy). It's actually a bit easier than that to search for a song on Winamp, but since it's so easy on both, it's pretty irrelivant. I've used XMMS quite a bit. It works, but I don't like it nearly as much as Winamp.
It sounds pretty similar to XMMS's 'j' searching. I don't know about automatically generated lists, but you can easily generate one with a search.
Not really important, though. I just find Winamp too bulky. I want to play music, period. I don't want a program that does anything else.