Our friend "BoneyardBrew" @ DA has created a new Firefox theme "TwentyTen" which brings Microsoft Office 2010 experience in Firefox.
This theme is very easy to install and highly customizable. You can change the theme colors using Add-ons tab. You can also turn Aero Glass on or off using theme settings.
You can download it using following link:
Thanks again to "BoneyardBrew" for creating this theme and sharing with us...