What is your favorite source of information on various browsers?
As you might have noticed, we are now shipping intellisense/validation schemas for XHTML and HTML 4.0. It is easy to obtain information for standard schemas from the W3C Web site. However, with specific browsers it is more difficult. What is your favorite source of browser information? Blooberry? O'Reilly books? MSDN? Netscape DevCenter? Netscape seems to have pulled information on Navigator 4 from their website though...
We would like to make our schemas better so pointers to reliable sources of information as well as general feedback are very appreciated.