Nofollow plugin for wordpress?

Is there a wordpress plugin that can make automatically all external links nofollow? And more specifically that can make external links in the footer nofollow.

I've used this:

http://wordpress.org/extend/plugins/nofollow/

for the footer, you can manually edit the theme files if you want. I wouldn't worry too much about all links being nofollow since you have internal linking structure that follow links would be useful.