Well, mobile browsers are pretty much all single-user, so a logout button is going to be overlooked. Making the "go to new posts" button the same and right next to it is kind of asking for trouble. Maybe put it on a new line? Preferably above the row it's on now.I like that idea a lot (of course only for logged-in users; it's meaningless otherwise), since I'd expect that to be the simple most-frequently-clicked link for mobile users. In fact, I'd even feel comfortable pushing the welcome/logout bar to the bottom of the page, which I know is a pretty radical idea.