Automatically create hyperlink from keyword

[dontpanic]

Right, but in doing so you have NO control over where the replacement occurs. So if for example, I used the word "Survivor" and I wanted that to hyperlink to "http://www.cbs.com/primetime/survivor8/index.shtml" it would do the replacement each and every time the word appeared. Now in the body of a post, this is cool...but in a thread title or other places, thus causes problems.

So I suppose my question should have been more specifically...within the post data itself, can this be done?