Suggestions for things to see in Phoenix

Well, we're a day away from flying out to Phoenix (where did the time go, anyway?!?!? A week between trips is not nearly enough) and we're trying to come up with things to see and do there that won't take too much time. We've ruled out a drive to the Grand Canyon or to the meteor crater (those will have to wait for another visit) for that very reason. In fact, the only things we really have on the list so far are rahirah and wildrider's reception, visiting with rackham's aunt and going to P.B. Loco Cafe (they were featured on a Food Network show earlier this week which is how we even know about the place). We'll be getting there late Wednesday night and leaving Sunday afternoon... which gives us about three days to see the sights.

So, any ideas? Thoughts? Suggestions?