One thing I did see getting used quite a bit in presentations at TechEd was the ZoomIT tool. http://technet.microsoft.com/en-us/sysinternals/bb897434.aspx
It enables you to zoom into a part of the screen. Very useful for presentations. The ability to draw on screen can be useful. The controls function as toggle switches so it is easy to use.
If you do a lot of presentations you may find it useful.