Some possibilities?
IE has a bad habit of giving away your profile, which includes your email address from OE or Outlook, when asked by a web page for the info. (or at least that is the rumor I heard).

Also, if you search your BBS username at G00gle you can find some of your posts and sometime email addys if they were attached to a message. For example, search my username and the first hit is my profile page for the empeg BBS. Maybe placing something to foil the searchbots would fix this?

Just some possibilities...

Sean in NC

EDIT: Roger, I just noticed that you have your email in your BBS profile. I bet G00gle has indexed this and someone is harvesting it from them. Do a search on "Roger empeg" and this is what comes up on the first page:

Profile for Roger - Forums powered by UBBThreads™
Main Index | Search | New user | Login | Who's Online | BBS FAQ. Profile for Roger.
Email, [email protected]. Name, Roger Lipscombe. Title, Pooh-Bah. ...
empeg.comms.net/php/showprofile.php?User=Roger - 8k - Jan 14, 2004 - Cached - Similar pages