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MIT SIMILE timeline app - look at the example.

Speaking of RIAs, MIT has been the source of all this - Starting with protoype. I was groping for some thing and I stumbled upon this app. Check the ease of use. The quality of presentation. Kudos to good design principles used.

Not only that check the data presented - very nice easy to depict flow. Here is another such app with very informative data.
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