I don't see the point of having one extra step if I wan't to update my status. I'd leave it as it is if I would like to encourage people to update regularly (that is the point of FB).
I am, however, looking forward to the "top content" feature as the right box (highlights) is useless for me (showing the same stuff I don't care about for days in a row)
Almost everybody I know (that isn't in IT) double-clicks on links. Even my ex-boss (who was a programmer back in the day) double-clicks on links. And no matter how many times you try to explain the concept of "single-click" to them, they don't seem to get it.