Matt has putted in context what will change with “Google Coffeine” he said that “Google Coffeine” is a rewrite of the Google Indexing System. A good search engine has to crawl really well, has to index really well and has to serve up, what mean has to return the most relevant pages for users very fast. So as I understood Google has changed the way of crawling and indexing WebPages. So far this is nothing spectacular, because Google always does changes with crawling and indexing WebPages but Matt too said, that the changes that have been done infrastructure wise rufly compare to the “Big Daddy up date” that happened late 2005 to begin 2006, hi I think all SEOs who did already SEO in this time have some lasting memories. Here is the first video from the SES in San Joes 2009 that I found to this topic, it’s an interview with Matt Cutts where he speaks about Google Caffeine. Follow > @mattcutts on Twitter

Too I found this video where Jim Stewart @jimboot the Australian Google Guru speaks about Google Coffeine. Follow > jimboot on Twitter

Google invites you to visit the web developer preview of Google’s new infrastructure at http://www2.sandbox.google.com/ you can try the new searches there. Here more Info toGoogle Coffeine from the Google Webmaster Central Blog.