Startup Yoomba just launched a service that lets e-mailers place VOIP calls and exchange instant messages. That's great for me. It seems to me that this is a no risk idea. The service is totally free. They operate a P2P service that lets any e-mail-address owner place a VOIP call or begin an IM session with any other e-mail address, whether or not the recipient also is a Yoomba user at all. E-mailers become users by registering at Yoomba's Web site. Interestingly enough, no login ID and password are required. Just enter your e-mail address, and the registration process happens behind the scenes, where the company's server links that e-mail address with their IP address. The service places "call" and "chat" buttons in Outlook, and Outlook Express. No need for any population which is typically a barrier. I think this attracts not only individuals but small businesses. This one is a potential biggie. This adoption can happen pretty quickly once people try it. Click and talk. Phone numbers become less important as we will use our e-mail addresses as our core communications id. We can change phone numbers, long distance providers or carriers and don't ever need to care about the phone numbers. This will definitely take off. The way they make money is through putting targeted ads in the user's e-mail interface. They're sure to have a pay package for an advertise free service, and speaking of calls, I need to make one myself.