As a follow-up to ajaxWrite, Michael Robertson announced ajaxSketch.
For right now it doesn’t seem realistic that either of these (or really any other) web-based products can compete with say, Microsoft Word or Adobe Illustrator. They are more proof of concept than anything for the time being. But they do provide a glimpse of the possible future in how programs are deployed and used in a collaborative environment. It would be foolish for Microsoft, Adobe and the like to dismiss this development.