GW has pulled the old Q&A PDFs from the Oz web site, so I've hosted them here for those who would still like to get hold of them. These are the pre-4th ed Q&As that have a lot more clarifications in them than the 4.0.1 FAQs.

Simply right click on the race name and choose Save As to download the PDF.

Chaos Marines

Daemonhunters

Dark Eldar

Imperial Guard

Necrons

Orks

Space Wolves