Scott Karp, the prolific and often profound writer for the Publishing 2.0 blog, spends a lot of space making a nevertheless sound point: Design has to work or nothing else will. In his words, if your users fail, your Web site fails. He is critical of sites that require registration without making the case that it is in the user's interests. Whether the user succeeds is everything, he notes.
Just because you can doesn't mean you should.
The new BBC site is no longer under wraps and it's highly impressive.