Google's PPC units have been hard at work over the past couple of months. We saw a few screen captures a few weeks back of things Google Adwords' unit was testing. Those test results are being rolled out as you read this.
Google announced the 2 new features on its Adwords blog: 1) new yellow backgrounds 2) instead of clicking anywhere in the box, users now need to click on the link in the top line of an ad in order to be taken to an advertiser's site.
The Adsense unit has also been hard at work and has rolled out changes as well. Adsense, when it appears on a website, will now have a new look. No longer will you see the text "Ads by Google" and each ad being divided by a line, the new version is a much "Cleaner" look. Ads are separated by whitespace and the text "Ads By Google" is replaced by a "folder tab" look and "Google" actually appearing in its logo font.
Could this be Google's attempt to prevent "banner blindness" from happening? With both of these changing at the same time, it certainly seems that way.