It's a great way to discover interesting people or to decorate iGoogle with the work of people you love. And I'm sure many companies will start to create themes to maintain the brand loyalty.
"As you may know, iGoogle has always provided you with great tools to access and arrange the content you want on your homepage. Just like a person's book or music collection is an extension of their personality, a user's iGoogle page is also a reflection of their loves and interests, both in terms of content, and now, visually," says Julian Sonego on Google Australia Blog.
In an unexpected move, Google promotes the gallery on the homepage using a graphic designed by Jeff Koons and an invitation to check the new feature: "What happens when great art mixes with your homepage?".
{ Thanks, Jeng, Jaime and Andrew. }
Update: If you can't decide which theme looks best on your iGoogle page, try the sampler theme. "With this theme, you'll get to try out a new featured theme every day and decide whether you want to keep it."