Damn that's a long title. Anyway here's Mike Monteiro from Mule Designs talking in SF: Creative Morning about how sometimes, creative workers (designers, developers, photographers or just any kid with MacBook pro) are being undervalued by the clients but even sometimes by themselves.
Mike's talk are the ones that you need prior engaging a project, possibly even when you're just starting out or when you want to fire your clients (yes you read it right)
So enjoy and please apply this for your next project negotiation.