Stopping netspeak?

[IvyKeepMommy]

What would be the best/easiest way to have specific words and phrases automatically replaced -- for instance u -> you, r -> are, ur -> your.

It drives a number of people absolutely batty (myself included) and I'd like to use a censorship option that would replace those words automatically.

Any suggestions or can you point me to a mod that might do this? I'd searched and didn't find what I was looking for (except for one mod that didn't work for me, but changed everything in all the posts to lowercase).

Thanks for your help and suggestions.