Check out this theme that I found over on the Chinese MIUI site. I posted a link to the site in the op but just found out that you have to have experience points to download anything. You gain points by making posts or uploading stuff. I threw my Firefighter theme up on their board and replied in a couple threads. Kind of challenging with google translator. They have a lot of nice stuff over there but like this one some of the icons are in Chinese. I'll take a stab at changing the lockscreen icons but I'm not much of a designer so if anyone else has some artistic ability feel free to jump in.
I believe credit should be given to Snow Song from miui.com and here is the link to the thread: http://www.miui.com/thread-7602-1-1.html?extra=page%3D2