WebEx for Salespeople with no dial-ins, downloads, or access tokens.
SlidePop lets you present a powerpoint presentation privately on the web at, say, slidepop.com/mark. The kicker is that no one has to dial-in to the meeting. You go to the link, click a button that says "Call Me Now", type in your own phone number, and when you pick up, you're on the conference. So no software to download, no plugins, no dial-ins, no static-y VOIP. No pain.