I stumbled upon this the other day looking for something that would export cached email addresses in a CSV format. Our stance has always been that if you want to hang on to an email address, add it to your address book, but people still get pissed when you have to recreate their mail profile and they lose those cached addresses. I used this yesterday for a user who's been having weird Office 2007 issues in general and we uninstalled/reinstalled Office. Worked great!
NK2.info Project