Yesterday Google introduced all new gaming themes for iGoogle. There are a wide variety of gaming themes to choose from including Super Mario, Mega Man, Street Fighter IV, Zelda and Spore. This is a great addition to the iGoogle theme offering and now gives gamers a way to further personalize their iGoogle experience.
Here's a shot of my iGoogle header with the Street Fighter IV theme.
For more details, check out the iGoogle gaming themes page.