The HST information seminars have ended, but they can be viewed as videocasts on the Canada Revenue Agency Harmonized Sales Tax (HST) - Videocasts webpage.
The videocast entitled Transition to Harmonized Sales Tax - Information for Businesses is approximately one hour long and provides an overview of how the HST works, the transitional rules, how to collect and report the HST, electronic filing, point-of-sale rebates, and key dates in the transition.