I expected better comments here. I think Marc's right to be excited and I've also been waiting for this for a while. Now that it's here, though, I'm underwhelmed. I think if they had worked with Firefox instead, the outcome would have been great, but as it is, it doesn't offer tangible benefits that are apparent enough to any normal user that would justify a switch. In other words, this is one of those exciting things that no one will remember in six months.