Recently I've been busy away producing some free video lessons. The latest series I'm working on deals with developing your ear as a bassist. This really helps you to play more soulfully, with more feel and is invaluable if you want to get more into improvising & working lines out by ear.
Here's lesson 1 - "Singing What You Play". I hope it's of help to some of you :-) http://youtu.be/HDcAjpDUQg4