anything similar to emacs patch mode?

[Lev Lvovsky]

I know I've asked this before, however I might not have explained my  
question well enough.

Can vim do something like what's described here:
http://atrey.karlin.mff.cuni.cz/~pavel/patch-mode.html

This is apparently a built-in ability of emacs now, it would be super- 
sweet if I could find something in vim that did this.

thanks!
-lev