Long Beach State pitchers have been very successful under Troy Buckley's leadership.
Some names to consider: Jered Weaver, Abe Alvarez, and this year's LBS success story (draft eligible in 06) Jared Hughes who transferred from another west coast college this season.
Also I would suggest keeping in mind that it is a wonderful thing to find a school where the pitchers develop such that they improve, but I believe the concept of developing pitchers so that they get drafted highly and suceed in pro ball is wonderful if it happens, but is not generally the goal for college programs ... it is nice if it happens, but that is not the purpose of the pitching coach IMO.
Plus, let's face it ... some pitchers have physical attributes & strengths (e.g., height, left-handedness, velocity) that are more highly desireable to the pro teams and that are likely to improve those pitchers' draft status no matter what the level of development in college.
So, IMO, developing a pitcher for success in college (read: WINNING) is likely to happen more frequently than developing a college pitcher for a higher/better draft status and professional success.
By the way, I know you included states as far east as Texas in your "definition" of the West Coast but that is quite a stretch