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 As of 2012 vivosearch.org uses Drupal and solrsearch javascript libraries. This chose choice could be revisited for the multi-site VIVO search project. 

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Serving the web site could be done with just about any system that allows interaction with Solr.  The solrsearch javascript libraries would allow any system that serves HTML and js to server this.  The options are expansive: httpd, wordpress, movible type, drupal, cold fusion.  If the solrsearch javascript can provide almost all of the interactivity on the client side it might be desirable for the server side be as simple as possible.  It may even be possible to use static HTML and .js files served by any old web server.

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Once an index was created how would it be updated?

Rebuild the whole index?

Get a list of modified individuals from each site and only reindex them?

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