Automatically creating short URL's?

Folks:

Has anyone considered the idea of using one of the URL shortening 
services (tinyurl.com, etc) to automatically process URI's in messages 
processed by mhonarc?
When people on my lists post URL's, they are quite often long and 
unwieldy ... it would be nice if I could automatically translate those 
long URI's into shorter versions.
Thanks!

david