Update the Canon EOS 5D Mark III was offically launched today with an expected release date in the USA at the in of March 2012 and a list price of US $3499.00 (body only), read more about the specifications with our coverage of the announcement http://canonanswers.com/588/canon-announce-the-canon-eos-5d-mark-iii/
Northlight Images has reported that a source in Australia reckons the Canon EOS 5D Mark III will be released around 6 months after the Canon EOS 1Ds IV.
Now there are many rumours suggesting the Canon EOS 1Ds IV will be announced in the next few months, therefore the Canon EOS 5D Mark III may come as early September-October 2011.
The same page also says that L series camera lenses are required to get the best of the 18 megapixel crop cameras
Also Canon prices in Australia are expected to drop soon in order to deal with grey market imports that are very cheap at the moment due to the strong Australian dollar.
As with any rumour it will be a matter of time before we know the picture, but as ever you can bet Canon will keep their lips closed as they have with previous launches, with maybe a hint of an upcoming release (i.e. the Canon EOS 5D Mark II launch and the dark side of the moon, Designed EVOLUTION teaser)