I don't give a damn about the layout. I really could care less about what Mibba looks like. What matters is that the navigation is essentially exactly the same, so there isn't any confusion.
I like that the chick in the corner is gone. But the only thing that really has me so happy about this -- otherwise, I'd be ambivalent -- is the fact that you can see the amount of comments on blogs from the blog page. That was what bothered me most about new Mibba.
So, all in all, I am pleased.