Yongnuo and Shanny have finally released their Canon 600EX-RT clones. While both Chinese companies already offer a trigger for the Canon wireless protocol they now offer the speedlite as well. I already ordered both of them and will come up with a review as soon as possible.
Here is a quick link to the YONGNUO YN600EX-RT product page. I'm curious how this speedlite will compare to the original Canon unit.