Procmail condition to capture URLs

Does anybody have a good procmail condition to capture URLs?  For the
moment I am using:

* ()\/http://[^ <>:)]*

Any improvements?

        --Ralph

Dr. Ralph P. Sobek                Disclaimer: The above ruminations are my own.
Ralph(_dot_)Sobek(_at_)irit(_dot_)fr                       Addresses are 
ordered by importance.
sobek(_at_)irit(_dot_)fr                                        If all else 
fails, try:
newsmaster(_at_)irit(_dot_)fr, postmaster(_at_)irit(_dot_)fr             
sobek(_at_)diva(_dot_)eecs(_dot_)berkeley(_dot_)edu
Ph:(+33)[0]561558618 FAX:(+33)[0]561556258 http://www.irit.fr/SSI/~Ralph.Sobek/
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The United States should not only support but instigate a total ban on anti-
personnel land mines.  Every 20 minutes land mines claim a new victim!