Totally OT: email directories?

Many moons ago, there used to be directories of email address. While not the most complete, they could be useful for tracking people down. I'm searching for a couple of people that I used to work with, and am wondering if anything like this exists in a modern sense. Ideally I want something that can search on user names, as I know the ones they're most likely using. Zane -- -- | Zane H. Healy | UNIX Systems Administrator | | healyzh at aracnet.com (primary) | OpenVMS Enthusiast | | | Classic Computer Collector | +----------------------------------+----------------------------+ | Empire of the Petal Throne and Traveller Role Playing, | | PDP-10 Emulation and Zane's Computer Museum. | | http://www.aracnet.com/~healyzh/ |