Not sure what the correct term is but I am looking for one of those message / shout / chat box things. It needs to be-

Free or one off small payment for multiple boxes (this now rules out shoutmix).
Comments must be removable.
Simple to use with no fancy data base stuff. Haven't a clue about php
Usable on a regular website (ie not plugin for blog etc)

Yes I've Googled but can't really find anything that seems right. Prefer to use something that someone can actually recommend.

If using PHP is an option then I would be happy to set up one for you that's fully customized to however you want it to work. It would run on your own site so you wouldn't depend on an external service.

Thanks, it's not for me so that's probably not an option.