Yeah, I'd go with a pre-date call - especially when you've started dating someone. When you're older, life's busy and getting stood up on a Friday night plain ol' sucks for anyone. Though like someone said, be confident (i.e., "so we're on for 7. Yeah, Mediterranean over on so-and-so street, blah blah.")
Think about it from her end also. "It's been a week since we made plans. Hasn't called. Are we really on? Shoot, should I call him? Don't want to sound desperate. How well do I really know this guy?"
The added bonus - you give her the opportunity to break the date. Sounds counterintuitive but you'd be surprised how many people say yes when asked out but flake when it's time (without offering to reschedule.) Saved myself a couple bad/uninterested/awkward dates that way.
Oh yeah, a couple days before the big night is what I do. Eases the entire: "Shoot I called Thursday evening for our date tonight. It's Friday afternoon - on a workday - and she hasn't called back. What gives." Remember, we all have lives, sleep nights and some of us work for a living. From an older person's viewpoint. Aren't into the whole IM, email/online 24 hours a day thing.