grep email address
Some leads on how to grep email addresses from text files:
http://www.issociate.de/board/post/165079/Extracting_and_email_address.html
(uses a PERL module, technically)
Update: I got tired of searching in vain for a good, free tool to extract a few email addresses from a text file. So, I created my own
email grep tool it's hosted and it is greatly limited in that it only accepts a couple thousand lines of input text. But for small tasks, it's great.