Noticed "AdSense unit data" option on the Advanced Reports page, below the "Aggregate data" and "Channel Data". It provides information about ad units we set up on "Adsense Setup" -> "Manage Ads" page. Looks like it was implemented this week or so
Haven't seen it show up yet in my AdSense control panel, so it must be something they're still in the process of rolling out. Will let you know how it works for me once it's up and running in my account.