The redesign is to make it look more like the WD My Book drives, which is an attractive look. Alongside the appearance upgrade, there was a capacity bump with the drive topping out at 320GB now.
I am a big fan of bus-powered external hard drives, mainly because every external drive I’ve ever had has had a large power brick that was required. That creates two nuisances, first of all it greatly decreased the portability of the drive, mainly because I never wanted to mess with unplugging it or having to plug it back in, the second being that I always had to find an outlet, I couldn’t just plug it into my computer.
They’ll still be selling the 160 and 250 gigabyte models as well. The 320GB model will cost you a very fair $200, that’s a very fair price due to the fact that a 2.5” WD drive with 320GB of space is selling for $200 on NewEgg right now, without the bus-powered enclosure.