Wrote a PHP script to generate lists of dummy email addresses:
Free email address generator program.
When I'm setting up forums, such as vBulletin or PHPBB I like to insert some records into the database in order 'pack it out' a bit and gain a better appreciation of the design flow of the forum.
Simple free tools like this can be a good little resource at times, so this is going to be version 1.0,
ie: "it works".