Screenhero is a great new (beta) site/application that I found out about from Richard Byrne's award winning blog. This is a great app that allows users to share their screens w/ others. However, what makes this so sweet is the ability to both have control over the screen which makes it not just a one-way portal. This is ideal for collaborating or trying to troubleshoot any type of problem.
I highly recommend checking out Screenhero by clicking here!!!