UPDATE: CR has added updates about features in the release… please read that over there.
UPDATE 2: Canonrumors has confirmed what is included in the firmware update! In a new blog post this evening, they have a snapshot of a canon presentation today in Poland. Click here for a look at their snapshot for confirmation. NO 60FPS is listed!
“The new firmware for the 5D Mark II will arrive the week of March 17, 2010. This seems to be close to the NAB show.
The information briefly appeared on the Canon UK web site, itâ€™s now gone at the URL I was given.
More info on the subject to come.”