Adsense now offers round cornered ad formats
I was just browsing through JenSense.com (which btw, is a great resource for serious Adsensers) and noticed some new changes Google is making to Adsense formats – round corner ad formats. There are crisply 3 options, namely square corners, slightly rounded corners and very rounded corners. See my screenshot below of the dropdown selection in setup.

A slightly rounded corner 468*60 Banner format looks like this:

Though with each of these features, we now have more control over the appearance of the ads, borders are rarely standed out in my ad implementations for the sake of blending. Maybe it would look gorgeous on layouts where content are divided and scattered into rounded corner squares the same way. But blending this too much usually leads to unwanted traffic for advertisers thus bringing down conversion rate that will ultimately smart-price you and harm your Adsense earnings.
Anyway it’s always pleasant to try, isn’t it.