WORKS ONLY WITH FIREFOXI recently discovered a very cool Javascript that allows you to customize the Google logo with your own text and colors. (Not with our own images).
1. Download and install Greasemonkey Firefox Extension.
2. Click Here.
3. Go to Google.com.
4. Click twice over Google logo to change text and colors.
You can type only letters and space to new logo.
In color edit box, type the numbers: 1 - blue, 2 - red, 3 - yellow, 4 - green, other - random.