As far as I can tell the WotC FAQs and other OGL information is still online, but they no longer provide any links to it. This obviously makes it difficult for people new to using the OGL. Here are the links to important information. I would recommend that you archive these pages in case they eventually disappear.
Open Game Definitions FAQ
Open Game License FAQ
Other Licenses FAQ
System Reference Document (3.5)
Software FAQ
System Reference Document FAQ