This morning Michael Sullivan of Booz Allen Hamilton was speaking about bar codes and his computer flashed a "Would you like to update..." message. I had to laugh at the inappropriateness of the message in the context. Vista is supposed to be smarter about knowing that you're giving a presentation and not interrupting, but in truth there's almost no context where I want to be interrupted to answer that question.
Of course, systems need to be updated and without reminders, we're unlikely to remember. What I really want is an interface to my todo system so that such tasks show up on my todo list and I can deal with them in the appropriate context.