[steveklabnik]

I strongly, strongly dislike stuff like the old Digg bar, or the Reddit bar. I'm assuming that's what you're talking about?

    http://www.reddit.com/tb/fp3vz

If I'm looking at a page, I want the URL to be the URL of the page I'm looking at. Feels quite scummy otherwise.

That said, feel free to do it, nobody can (or should) stop you.

[Macha]

On the desktop, I couldn't agree more. On a mobile device, its a handy shortcut to the pages I will most likely visit next anyway.