A beautiful theme recently popped up in the BBOS forums, by member AlmostDone. It's a theme inspired by the UI of the Nokia Meego device. It has a beautiful wallpaper, as well as some very fancy and clean icons. The indicators are also very modern. I don't usually don't do themes on my device, but this one is worth trying out. You can pick it up via BlackBerry App World for only $1.99.