I'm thinking of doing something similar, but need you guys' advice first. http://www.heroesrevealed.com/
Great blending, but I think that unusually shaped thing to the left of the rectangular ad unit could be classed as an image and therefore not allowed. It depends on whether Google think it draws attention to the ads or not and only they could tell you that. They are getting quite strict on ad-image alignment now.
You have to consider this because this not image ad combination but an theme customisation as such..I dont think there is problem with this.....
Uh, I know this isn't much of an answer but that MIGHT pose a problem. You might consider asking them.
I'm not sure how picky adsense may be about it, but to be safe you can remove the line that is sticking towards the adsense ads.. I know they don't allow any sort of "arrows" pointing towards the ads at all.