KyloUI - Simple, Elegant, Uncluttered, Useable.
In browsing the forums at all the wonderful UIs it became clear to be that although many of the UIs here are fab and groovy that there's a distinct lack of some of the most important considarations (at least for me) for a Tank;
The more you can see the more aware as a Tank you can be, and awareness is at least 50% of what being a good tank is all about
Critical Activity Centre:
Moving DBM, PowerAuras, Scrolling Combat Text, ZOMGBuff, Tidy-Plates into the critical center of the screen where all the action happens. This is enough to give you all the critical information you need.
Moving other useful but non-critical information to the edges of the screen (frames, chat, buffs, etc)
You can download it from my DropBox here: http://dl.dropbox.com/u/3342216/Worl...aft/KyloUI.zip
Edit: If you are having FPS problems with this setup TidyPlates and Skada clashing can be one of the worst offenders. I found that switching from Grey/Tank to Neon/Tank theme in TidyPlates does help if you're FPS takes a nosedive after a pull