Forums/Community Help/Addons
PlannedDoneNot planned
URL shortener/cloaker
AutoBlogged Support
suggested this on April 08, 2011 14:39
Automatically cloak/shorten all external URLs.
Comments
There is already a great plugin for that.
WP No external links
you can mark all external links with a /slug/ or just new a unique shortcode, maybe you can use it.