Google has a new feature that photographers may enjoy: you can now customize the Google homepage with your own photography. Visit the Google homepage, and you should see a “Change background image” link on the bottom left hand corner of the page. If you don’t see this link, try logging out of Google and then visiting the page.
You can use images from a preset collection, a public gallery, your Picasa account, or your computer via upload. If you can’t see this feature for some reason, it should be rolled out to you shortly.