It's safe to say that World of Warcraft has been a pretty big hit for Blizzard. In
fact it's quite likely been the gateway into MMORPG's for many
people. Certainly a lot of folk I know who otherwise didn't care about them have been hooked by the title.
Blizzard, always a company to give away "added value material", have continued the trend into their first big online
venture. They're offering a user interface customization tool. It's recommended for advanced users, and it allows you
to, apparently, tweak the interface to your hearts content. So if you're a WoW'er, and feel the need to tinker with
things, you can.
Engadget
TUAW