The current line of thought is that pressing and holding the Artist/Souce/Genre/Year buttons will perform a reverse tweak, which we're calling "hate".

So if a Britney track comes on, you press and hold Artist ("Hate Britney") and all Britney tracks will be removed from the current running order.

For fast search access, you would press Search followed by the appropriate criteria button - e.g. Search then Source to search by album.

Rob