I'm looking for a Web-based service that would allow my site visitors
to post comments at the bottom of every page on my site. I don't want
to put a database on my site, just use someone else's database. I
already use a great survey service that lets me post surveys and
survey results, and I'm looking for something similar for comments.

Can anyone suggest anything?

Thanks!

- Thom

I'd like to answer.

If you don't mind ads, HTML Gear's Feedback Gear is one of the best I
have encountered.  You can find it at http://www.htmlgear.lycos.com.
Hope this helps.

Librarianz

Thanks for the comments - on my own I found Trumpeter, which seems to
work just great.

http://www.numericsolutions.com/trumpeter/ 

- Thom