This Windows 7 gadget will show the basic ranking information about a player, like the league badge, division, division rank and number of wins. The total number of games is also displayed for Masters and Grandmasters. Profile pages in all languages are supported and should display nicely:
If you're space constrained the "Smaller size" mode is also available. You can switch between the two sizes by clicking on the arrow icon that appears when you hover with your mouse on the sidebar.
Download the file from the link below and simply double-click it to install it and put it in your sidebar.
Once launched you'll probably want to put it in "Larger size" mode by clicking on the arrow icon, and then enter your Battle.net profile URL by clicking on the wrench icon: