How many times has this happened to you? You visit a Web site but registration is required, with a valid email address needed for confirmation. But maybe it's just a message board you want to read one time only, or a store you have no interest in shopping from again and from which you don't want to be saddled with a lifetime of spam. And you can't use a made-up email address because you have to confirm a link or send back a reply. Well here's a brain-dead simple solution to the problem: 10 Minute Mail, which provides, for free, exactly what is promised in the name: <A HREF="http://tech.yahoo.com/blogs/null/8297">An email address that vanishes after 10 minutes.</A> There's no registration, no verification. Just click over to the site and hit "Get my 10 Minute Mail email address." You'll instantly be given an address that ceases to exist after 10 minutes.