Here is a quick list of websites that every Oracle WebCenter developer should be aware of:

Oracle WebCenter blog: http://blogs.oracle.com/webcenter
Proactive Support Portals: https://blogs.oracle.com/PortalsProactive/
WebCenter Content product alerts http://blogs.oracle.com/ecmalerts
Oracle WebCenter Homepage: http://oracle.com/webcenter
Oracle WebCenter Newsletter: http://oracle.com/newsletters
Twitter: http://twitter.com/oraclewebcenter
Facebook: http://facebook.com/webcenter
LinkedIn: http://linkd.in/ORCL_Social