tag:blogger.com,1999:blog-9854403.post8038412863817340766..comments2008-05-04T00:07:31.890-05:00Erichttp://www.blogger.com/profile/10808654379002826497noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-9854403.post-17153332159700570932008-05-03T18:17:00.000-05:002008-05-03T18:17:00.000-05:00If Economist takes a top down view, so will all its readers. The biggest constraint in any service is closure. This is the reason I agree with you on email being a killer app because it has the highest closure. Closure is kind of like the bottom up component of our largely top down services. The other point is degree of abstraction. Users need a mechanism to separate their avatar from their self in a flexible manner. The last point is granularity - only fixed platform and changing plugin models have any chance of surviving novelty grace period.amolpatil2kamolpatil2k.x10hosting.comnoreply@blogger.com