(At least I think thats the proper term. ) I am considering launching a new site, and I wanted to e-mail people with an obvious interest in its content. I have eyed a couple similar sites that make their users e-mail addresses accessible via forums. I am thinking about extracting the users addresses and using them for a mailing, calling attention to my site.

Questions:

o Is it ethical to "farm" the e-mail addresses?
o Is it spamming (even though I KNOW those users have an enthusiasm for the subject matter and would likely find my future site useful)?
o Where do you find the software to accomplish this?
o Should I do it?