Autodesk has three blogs dedicated to Vault.
Under the Hood - Learn about Vault features and workflow techniques from the articles and videos on this blog. This site is run by Brian Schanen, who is a Vault customer success engineer.
Cracking the Vault - Find out how to keep your Vault running smoothly. This site is run by Richard Rankin and the Vault support team.
It’s All Just Ones and Zeros - Learn how to program customizations for Vault, or just download the cool sample programs available. This site is run by Doug Redmond, who is a programmer on Vault development team.