My favorite PowerPoint bash is here. I think it sums it up quite nicely.
(My least favorite communication tool is Excel when used as an organizer rather than a spreadsheet. Ever try to compare two Excel sheets to see what changed? Maybe there is an easy way, but I haven't come accross it yet. The solution I had to deal with is require the author of the sheet to mark changes in red. Then you have to go searching for red things. I prefer to be event driven, getting just changes, rather than polling, having to find changes...)