Deployed earlier today, under the menu Sales->Profit And Loss Report.
This is a report based on your settlement periods (Amazon Payments). It, therefore, reports on SETTLED orders.
You can now see settlement amounts across settlement periods. Indeed, you can view any time period and show the results by Day, Week, Month, Quarter, Year, and by settlement period within the time period.
I took the opportunity to take a screen print with our new default skin (not yet publicly available), however, if you preferred the old skin, it will still be available and you can choose your preferred colours.
The Knowledgebase article is being written as we speak, but this screen is quite self-explanatory.