Crunchyroll announced earlier today that the fourth season of The Familiar of Zero, "The Familiar of Zero F" (Zero no Tsukaima F) will be streamed as part of their Winter 2012 lineup. The fantasy comedy series is based on the light novels by Noboru Yamaguchi (with illustrations by Eiji Usatsuka) published by MF Bunko J.
You may recall an article I posted a while back about Noboru Yamaguchi taking time out from writing his visual novels to undergo cancer treatment. Thankfully the operation to remove the cancerous tissue was a success and he made a full recovery.
The Familiar of Zero F will be streamable to North American internet surfers only, full timing and launch details will be announced at Crunchyroll soon.