A more advanced experimental tool from IBM called Unified Activity Manager does all that and more, linking into other corporate applications such as workflow systems. It not only combines the elements of a current activity but also pulls in those elements from past similar activities. These notions of "activity-centric collaboration" will show up in the next release of Lotus Notes, dubbed Hannover, which is expected to ship next year, Gruen says.

Meanwhile, Microsoft Research has developed a way to combine e-mail, files, Web pages, calendar entries, to-do lists and other materials into one searchable archive. Called "Stuff I've Seen," the prototype uses MS Search to index a user's important content and then offers it through a unified interface with sorting, filtering, previews and thumbnail views.

3. New e-mail applications will emerge, including tools that mine message archives for corporate intelligence.

Even as e-mail yields turf to upstarts like IM, especially among younger users, new uses for e-mail are on the horizon. As companies and individuals begin to systematically archive messages, the e-mail becomes available for data mining, and researchers at a number of companies and universities are developing ways to make these archives more accessible.

For example, Hewlett-Packard Co. researcher Bernardo Huberman is devising ways to "harvest organizational knowledge" by mining the e-mail messages and PowerPoint presentations of employees. His techniques go way beyond the searching and categorization of messages that products do pretty well now. Huberman looks at the strengths of communication bonds among employees and patterns of communication that can reveal both hidden problems and opportunities.