IBM WebSphere Software - A set of software products to develop and manage high-performance web sites for advanced e-business applications. - http://www-306.ibm.com/software/websphere/
IBM developerWorks: WebSphere - Technical information and community for the IBM WebSphere software platform specialists, including installing, configuring, using, and mastering WebSphere Application Server and related products. - http://www-128.ibm.com/developerworks/websphere
WebSphere Journal - Publication for those who design, build, customize, deploy, or administer IBM's WebSphere suite of software products for creating and deploying e-business applications. - http://websphere.sys-con.com/
WebSphere Redbooks Domain - IBM redbooks related to WebSphere. - http://publib-b.boulder.ibm.com/redbooks.nsf/portals/Websphere
Wikipedia: WebSphere - Description of the product family. - http://en.wikipedia.org/wiki/WebSphere
WebSphere Insider - An electronic newsletter that provides best practices, tips and tricks, and real-world case studies on building, managing, and deploying applications on the IBM WebSphere Software platform. - http://www.ebizq.net/websphereinsider/
Websphere Software Global User Group Community - A forum to communicate experiences, ideas and technical expertise related to the use of WebSphere and related products and issues. - http://www.websphere.org/
WebSphere-World - User community offers news, hints-and-tips and articles to WebSphere developers and administrators - http://www.websphere-world.com/
WebSphere Advisor Magazine - Table of contents and sample articles available without subscription. - http://websphereadvisor.com/
Michael Thomas - A resource for help in preparing for the IBM's certified WebSphere exam. Also includes installation notes. - http://www.michael-thomas.com/tech/websphere/