The Game Bar displays your current Health, Energy, Stamina, and Energy Pack Timer on a toolbar on your internet browser so you can check on your Mafia Wars status at any time. This could be pretty useful if you were a very active fighter so you can easily see changes in your health if someone is attacking or hitlisting you.
As an added bonus, if you install the Mafia Wars Game Bar, you will get the Utility Belt (armor - 30 attack and 30 defense).
There is a downside to the tool bar. When you are browsing the web and your toolbar is connected, Mafia Wars treats your account as if you are actively playing, so you can get snuffed many times in a row with the toolbar installed.
On a side note, my new Mafia Wars Guide
Edit: I'm sure you are surprised - there has been another set-back. The product and site are finished and ready to go, but now it's going to take 3-5 business days for ClickBank (the site I am going through) to process the ebook. At least everything is finally finished!