If I need a custom application to be able to login to my Yahoo Account automatically without human intervention, is OAuth the service that I would use? If not, can you tell me how I should go about accomplishing this.
The answer to this depends on what you want to do exactly. We have APIs that require OAuth signing, then we have APIs that use BBAuth...and then others that don't require any signing at all. In the case of accessing your personal account information, changes are you will be using OAuth. What are you trying to do?