I recently wrote a series of posts on one of our sister blogs about how we use Powerpoint as a user interface prototyping tool.
Powerpoint for Prototyping - Part 1: Outlines the various levels of fidelity we work with, ranging from sketch to fairly high fidelity interactive.
Powerpoint for Prototyping - Part 2: Provides some detailed examples including Powerpoint tips and tricks.
I am re-posting here because it gives a bit of a window into how we do design within our group. I am also curious to hear if and how this type of interactive and mixed-media presentation style is applicable in your work. What kind of innovative techniques are you using to collaborate with your colleagues and clients?