Note: There's apparently some confusion about my stance on the whole web-based direction that Wizards of the Coast is taking Character Builder. First, I don't mind if it requires internet access. That's a perfectly acceptable response to some fans' stance of picking up a month of DDI a year, or every so often, to get a shitload of content for an incredibly low price. Second, I like the fact that my character is saved server side, as it means that I can access it from anywhere instead of having to transfer character files back and forth between PCs, and I don't have to worry about losing my data.
You can read up on what details are revealed here, and bitch about it here. Since it's web-based you'll need an internet connection and Silverlight to use it (they're also pulling Character Builder from the site when it rolls out, so no more offline support, period). On the plus side, there will be immediate support for both Dark Sun and Essentials, and character files will be stored server side. Oh, and all previous content will be there, including the option to import older characters.
The new design looks a bit friendlier, though I've never under understood their obsession with "jagged" graphics, which contrasts with the smoothed borders that the buttons use. I just wish they'd pick a style and stick with it. Something actually fantasy would also be great. There's not a lot shown, but picking from styles would probably be handy to help narrow things down for new people.