I thought I'd bump this up in case anyone has more to say about "better scanning characteristics."
I've been using my stash of Pro Image 100 off and on for four or five months and really like it. It seems to scan fairly well (at least by the lab I go to) and, compared to the other film I'm mainly using these days -- very expired 800-speed film -- it looks like really hi-tech stuff.
This is a shot on the film, taken in my Minoltina P, and scanned by a local WalMart.

There's a bigger version of this at my Flickr page:
http://www.flickr.com/photos/flipflik/6456020343/sizes/o/in/photostream/