Did you know that both Google and Yahoo are offering free libraries for making AJAX type interactive websites?

Google Web ToolKit:
http://code.google.com/webtoolkit/

Yahoo! UI Library (YUI):
http://developer.yahoo.com/yui/

Big kudos on YUI as the samples and ease of use is quite impressive

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  4. Two new Google offerings (Google Code and Project)
  5. Yahoo web analytics, who knew?
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  7. Google API Code Playground