Although the site may look similar the internals have changed a bit.  This is a much needed upgrade to Joomla 1.5 since 1.0 is slowly being deprecated.  Also the content was getting a bit stale.  There's some question whether a web site is necessary with all of the social sites available now.   There may still be a need for custom applications as well as a good place to blog or consolidate information.  Now comes the task of organizing the information into a usable format.