if you're looking to go into jazz then you really have to know your theory. Nothing else can help. Transcribe every piece of music you listen to. Study about key centers. Listen to everything that comes your way (classical music included

). Study your fingerboard until you can find notes on them without having to think at all.
Miles Davis is a good listen. Ray Charles also comes to mind.
The more modern guys on piano like Chick Corea or Michel Pettruciani.
Bebop and big band stuff by the Buddy Rich band. Charlie Parker.
And also any band with "New Orleans" in the name
Just google jazz and you will see all the greats listed there.
EDIT: there is no fixed scale for jazz. It's just a big mish mash of notes done properly.
This post has been edited by Bassix: Jan 26 2008, 09:45 PM