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Special preview: DEMOfall '07 highlights A new crop of startups take the stage to pitch their wares, and as usual, the accent is on Web 2.0 and collaboration

Access to and the sharing of information is this year's theme with companies demonstrating tools for team collaboration, tracking online information, information filtering, and a technology that is harder to explain than use: Turning the Web in a participatory medium for bookmarking, clipping, and discussion sharing. Diigo is both the name of the product and the company that turns a Web site into a "participatory" site, according to Wade Ren, CEO and co-founder. "Diigo doesn't need enterprise adoption to work, but the more people who do adopt it, the better it is," says Ren. Diigo allows users to highlight portions of a Web site and add comments, using the design concept of a sticky note or a cartoon bubble. The note is persistent, so next time the user opens the site, the note will be there. The tool is a browser plug-in that can be downloaded and placed in the IE or Firefox tool bar. While wikis like Wikipedia make sets of pages writable and editable, Diigo makes the entire Web a writable media, according to Ren.