As I've mentioned before, the department I work in publishes the WebSphere Recommended Reading List (PDF). We've just updated it.
We have updated the list to retire many old articles which are now outdated or obsolete, and have added a plethora of new articles on WAS 6.0, to focus the list on versions 5.x and 6.x. We've reorganized the taxonomy of the list to make it easier for readers to quickly find what they need.
We're also looking for help to keep improving the list in the future. If know of items we should add, better ways to organize the list, or a new category of information you'd like us to add, please let us know. You can use the comments field at the bottom of the web page; for detailed comments, you can e-mail me. Thanks.