Wow, there's a lot going on with the backend design! I am really impressed with the works presented here lately.
Since I don't have the time currently to actively design on this, I'd like to contribute my feedback though. I think of all the recent design contributions have their pros, and if we could combine them it would make a close to perfect interface.
@hrioo: Great colours. Well, you got my soft spot since I love dark red with black and white, but anyway the combo looks smooth and perfectly integrated. I would only change the blue-greenish line into another colour. So, if we could get the backend layout look as generally integrated like this concept it would be brilliant.
Your later contributed version is a bit too much all black/white/grey to me. But that's just individual taste, isn't it? Anyway I would prefer the website baker logo beeing preserved. The logo you suggest doesn't have the visual effect as the baker's hat has.
@Stefek: You're doing a great job on icons. I particulary think that the icons for page modification and preview are an improvemt. The clock icons aren't so easy on the eyes though, I think it's the divided square background which makes them a little less clear.
The big icons just rock! They are "speaking" and I love the little baker in the access and admin tools icons. It's a good idea to have WB's core and only constant marketing tool -- the baker's hat -- repeated.
I agree with Argos, that the top icons (logout etc.) need improvemt.
@Hieu: Your shot at the backend design produces a very clear interface with light colours. I only think that there are too many different shades of blue in it.
@Bramus: The fisheye is a nice effect, done on the top icons.
So, let me put things together: An integrated, visually smooth colour design like in hiroo's first shots, plus the new big icons and most of the small icons provided by Stefek, and possibly the fishey as an addidion. There we'd go, folks