xgamer said:

pptPlex looks good... But it seems limited feature and limited support.

I have been using picLens ( http://www.cooliris.com/ ) for a while for helping our sales team with presentation. The effects are quite good. It supports PP 2003 and Keynote. Has IE/firefox plugins.

I think MS should make pptFlex full featured so that it can become competitive to products like picLens and will help in promoting products like touchwall.

Yes, today only I came to know about Cooliris Plugin For PowerPoint from channel10, though I have been using its browser plugin since few days.
Let us hope pptPlex will further improve.