I'm looking for an open source framework that uses MySQL as a schema-less datastore like the one described here http://bret.appspot.com/entry/how-friendfeed-uses-mysql<p>One option would be to use MongoDB but for this particular project I'm constrained to use MySQL.
InnoDB provides a schemaless datastore and can be used directly. A couple of results for a quick google search for "innodb nosql":<p><a href="http://yoshinorimatsunobu.blogspot.com/2010/10/using-mysql-as-nosql-story-for.html" rel="nofollow">http://yoshinorimatsunobu.blogspot.com/2010/10/using-mysql-a...</a>
<a href="http://blogs.innodb.com/wp/2011/04/nosql-to-innodb-with-memcached/" rel="nofollow">http://blogs.innodb.com/wp/2011/04/nosql-to-innodb-with-memc...</a>