I have http://www.ex-mobile.com and I use adsense. I often change placement of ads. Can you tell me is this ok right now ?!
Because it is boring to see ads on same places like a 6 months ago. Its more attractive to change places of ads, for me it has better click rate.
Now looks very nice. If that is my site I will leave ads there for some time to see how they perform if CTR is bad I would than change them.