We've taken to using Skype a lot recently. In particular the screen sharing facility. For those not familiar with this one can simply allow people you are having a Skype session with to view your computer screen or indeed they can allow you to share their screen. Whether you are giving a product demonstration, or working together on a document, or simply letting people know what you are working on, this works brilliantly.
Combine Glasnost with Skype and your productivity will rocket !