You can personalize the way your homepage and profile page look by creating your own theme. Here's how:
Scroll over the 'Home' tab.
Click on 'Colors & Styles' in the drop-down menu.
Click the 'Create Theme' link.
In the left column, click the 'Change Image' button to select your own background.
Click the color wheels to make changes to your links, font, and box colors.
Choose whether you'd like to apply the theme, save it, or both.
Once you're finished, click the 'Save Changes' button.
Hope that helps!
at 6:18 AM on Jun. 9, 2010