No, pretty much the only thing you can do with those files is restore them back onto the iPhone. There's nothing that will "convert" the files directly into anything useful. If you wanted to export your contacts from the mddata file, you'd restore the iPhone from the backup, then export the contacts from the iPhone using iTunes into Outlook, mobileme, or some other contact/calendar software that iTunes talks to, and then export it into your desired format from there. But so far as I know there's no software that translates directly from the iPhone backup files into any usable format.