Google is trying out Ads with little arrow buttons on them which rotate the ads. Sliding arrows don’t always come up, indicating it’s in a test stage. Many bloggers have reported of it being displayed on their blogs.
It has been observed on the Half Banner and Large Rectangle formats.

The adsense external file is called “http:// pagead2.googlesyndication.com/pagead/ show_ads.js”. It basically displays the ads. Here goes the entire code.
( function(){
// NOTE: This file is intended to be compiled with JSCompiler. If you are
// getting a compiler error when using a JavaScript built-in, please update
// google3/contentads/frontend/externs.js
function quoted(str) {
return (str != null) ? ‘”‘ + str + [...]

Check out eCPM — what exactly is that? from Inside AdSense blog.

Smart Pricing is a feature added by Google to give Advertisers value for money. Adsense publishers set up temporary, trashy and/or un-authoritative pages of content on topics that they know will get high paying adverts. Clicks on such pages are not really of good value for advertisers (really ?) The system, known as “smart pricing,” [...]

DESCRIPTION:
SysSense is your personal desktop Google AdSense monitor. It keeps your current Google AdSense information in the Windows system tray. You can monitor an unlimited number of Google AdSense accounts. A sound and/or system tray icon balloon can be configured to alert you when your statistics have changed.
See adsense earnings on your windows desktop without [...]

Google has modified the Ad Units to decrease accidental clicks.

By allowing users to click only on the ad title and URL, we aim to decrease accidental clicks, better aligning visitor behavior with their intent.
We currently monitor clicks on Google ads for accidental clicks, and the format change complements our monitoring system by further ensuring advertisers [...]