[sodde]

Having tried the WP7 theme on a couple of different WM ROM's (inc stock), I can say that it is somewhat unstable. From my experience, it seems to be more of a problem with throttlelaucher than the theme , although there are issues within the theme and its additional widgets that initiate these problems. Avoiding some of the tabs that cause problems helps but the system seems to corrupt over a few days and you end up doing a re-install.
Having said this, I don't want to detract from the guys who have spent time and effort in getting this up and running, it does show promise and definately looks good when it works!