If your Xbox 360 is looking a little drab - and you're not adverse to spending money on tarting it up - then hey, this new Crackdown theme might be just the thing you're into.
It'll be available for download tomorrow, and will cost you 240 MS Points (USD$3). A ridiculous price for a theme, yes, but hey, some people really like Crackdown. A lot.
Crackdown Premium Theme [Microsoft]