With this program (http://www.door2windows.com/windows-7-start-button-changer-change-your-windows-7-start-button-with-one-click/) you can change the Windows 7 Start Orb or button something cool.
1. Download the program from above link and save the program to known location.
2. Download some cool Start Orbs from here: http://browse.deviantart.com/customization/skins/windows7/startorbs/
3. Right click on the downloaded file named “Windows 7 Start Orb Changer.exe” & run as Administrator.
4. Click Change button and select your favorite downloaded Start Orb.