Now and again I notice that people don’t know this about Safari—you can get URLs displayed when mousing over a link. It’s just turned off by default. (Maybe that’s changed for 1.0.)
From the View menu, choose Status Bar. That will give you a status bar that displays URLs like in other web browsers.
It’s very weird I think to have this feature turned off by default. It’s such a standard part of web browser UI.
But it’s also a very Apple thing to do. They must have decided it’s a power-user feature, that most people don’t look at the URLs when hovering over links. They may be right.