VB4 has a Autolinker MOD, designed by BOP5 ( I think).
I would love it if someone could port this to VB5.
It does what it says really, in the ACP you set a link to a word, and everytime that word is typed in post, article or blog, it is automatically converted into a hyper link.
I am sure there is, but that is something I doubt anyone would do it for free. If you want, you can always post a request here, Requests for Paid Services