While content springs from all sorts of channels, by far the most popular electronic channel is still...email. Not that we love it, but it's there, as Sir Edmund Hillary once opined about Mount Everest, and that's perhaps its most important positive attribute. It's an interface and a metaphor that even the most technophobic people can master at some level. Along comes Kubi Software, which has invented some neat collaborative tools that drop in to Microsoft Outlook and Lotus Notes and provide simple, intuitive ways to introduce content sharing and team documents into an interface that is already familiar to millions. At first whirl, it appears to offer a lot of the collaborative upside of Groove Networks without a lot of heavy and intricate software. An interface's value to an individual is sometimes as important to content value as the content itself; oftentimes simple and familiar channels are the best.