Bad: It's a perfect example of what is wrong with the Chrome Extensions Gallery.
The themes actually appeared late yesterday, though they looked like extension spam to me. There were no screenshots posted. They're not labeled as themes. Their titles, if you browse via the recent extensions link, only show the name of the country. The image you see below is the "detail" page for the England theme.
It really is time to give themes their own home. Chrome, after all, doesn't take you to the Extensions Gallery when you choose to get themes via the wrench menu's options page. No, it takes you to the themes site.
So how about it Google? Can we please add a "user created" section next to Themes by Artists and Themes by Google and get them out of the Extensions Gallery once and for all?