Anyway, outside of the marketing-counter thing, I would suggest that the initial layout for a user's start page is the same as the one that is so prominently displayed on the sample images (with the grey background and color bars). Not that it was difficult to change, but it was a little disappointing when I found just a simple white layout with my single forlorn link to HN on it instead of the stylish advertised one... I almost took off right there. Perhaps selecting a layout could be a more prominent initial setup step?
Why do you need my email when I sign up? The signup doesn't ask for a password re-entry as well, which I found strange.
What do the ampersands mean?
Nice work. Looks great, too.
[edit] Why should I use it? Chrome and Safari (and FF in the near future) offer close to the same functionality.