I am looking for a plugin that can scan a post and replace keyword(s) I choose with whatever I choose to replace it with. Basically, I want to replace keywords with links to either internal posts/pages, affiliate links, or whatever. Also, I would prefer one that is reasonably configurable. Being able to only replace a certain keyword max 1 time per post, for example, would be pretty much mandatory. Being able to specify which posts/pages get the treatment would be nice also. I did a google search and was not able to come up with what I am after. Anyone know of a freely available plugin at the wordpress site that can do this?