I have some different sites, with about 3000 visitors a day. I want to collect the emails from them, so that I can make my collection for some stuff.

How should I do this?
- With a simple "Newsletter - Enter your Mail (For comming Mp3 songs)"?

- Or I create a site, that redirects you to the next page, if you enter your mail? How could this work?

I also could make some simple |Register to Download the songs|, but I don't really want to use this, also because, Google wouldn't spider then my Mp3 site.

Has someone some different method at his page?

Greets