Links to general Ars Magica information, links to medieval information, and notes on Pax Magica MUSH (a Mythic Europe/Ars Magica-based roleplaying MUSH).
A PBeM game run by Timothy Ferguson. Big archive (all the email from the game seems to be archived here), and according to the pages you can even join in the game.
Product updates, game homepages, email addresses, and other stuff. Considering recent developments, it's quite possible this link won't be here for long. I'll keep it as long as they continue to provide content relevant to RPGs, though it will no longer appear on the companies page.