I think it just takes a little common sense to use these tools outside the office. If you are constantly distracted from your "significant other" checking email and taking phone calls, then you need to learn to set proper priorities.
On the other hand, if having a PDA allows you to get away from the desk and not have to worry about waiting for that important email to arrive, then these modern devices can enhance your personal life.
I take my Pocket PC almost everywhere, but I leave it in the car when it's not appropriate. For example, we recently had a nice romantic get-away in Monterey that would not have been quite so romantic if I was more focused on my Pocket PC than the wonderful lady by my side.
Actually, the Pocket PC is a source of good-natured ribbing. Like when we were trying to find a restaurant and by the time I got the GPS software working and entered the destination, we were right in front of the place! It wasn't the best display of technology

ops: but it was good for a few laughs.
On the other hand, the fact that we could get away and I could still make sure that things were running smoothly back at the office was impressive enough for the Pocket PC to be tolerated.
You just have to know when to put the toys away and focus on your life away from the office. And most importantly, learn to ignore the "inbox" alarm when she's talking to you! 8O