xperiagamer.com has some themes if you're on .42 which are pretty cool (one of which I believe is ICS from one of the XDA members here). I've decided I'm going to change my own through apk manager etc. Will be a steep learning curve but will be fun to do it.
Already figured how to change images in the status bar. Gonna ICS them later. Then want to work on creating some toggles into the framework-res.apk. Some people on here have done some fantastic ones but just not how I would have made them so gonna give it a go.