When I tried to register, I get an error upon entering my email address - "invalid email address" - I tried closing and reopening the register window. (I'm trying on Chrome 9/Win)

Otherwise, just looking through it - like the layout and the general concept is intriguing. To answer your question of focus, I like the idea of filters or aggregating additional content. (But please let me choose whether or not to accept those new content streams.)

EDIT: When I register from the homepage, the form works. Previously I tried to click register while viewing your sample Nader page.