I am thinking of adding comments into an old site of mine - when we were on travels using blog to publish, we had a lot of comments, and I miss them :-(

The thing is, I'd like to avoid having to build it from scratch and wondered if anyone has a recommendation for a PHP-comments solution that I could pretty much plug in to an include file.

Naturally I'll need to set up a DB, and ideally I'd like to have captcha in there too.

But mainly I want it to work and produce clean, accessible markup

So, if anyone has any suggestions, I'd appreciate them. Otherwise I'll just hand code from scratch as originally planned ...