PremEx - No, I haven't signed up for those 2 services, but now that you mention it, I have done so at a few others, like at Delta, Northwest, and MSN's The Answer Geek. I think you might be on to something.
neverhome and others - Interesting comments about hotmail accounts seeming to have this problem worse than others.
Randy - I, too, never thought FT was selling our email addresses. I assumed, like others here, that they were being "mined" by spiders and all. I never once thought that FT was involved, but thank you for your comments.