For someone who prides himself on a good sized address book (and hence, a lot of friends (or at the very least, acquaintances)) my address book is in terrible shape. Enter Plaxo. I’ve gotten a few automated emails from friends using the service to update their address book. So I tried it out and I’m glad I did! Something like 40 email addresses in my book bounced. And like 60 friends of mine used the automated Plaxo service to update my address book automatically! I never would have had the perseverance to do that kind of update myself.