w3m/gnus feature request

[Tom Tromey <tromey@xxxxxxxxxx>]

I recently started using Emacs 22.  I was pleasantly surprised to find
that Gnus now displays HTML email using w3m -- nice!

However, if an HTML message contains a URL, when I click it, it is
also opened in w3m.  In general I don't want this -- I almost always
want to use my external web browser.  (However, if I explicitly opened
w3m myself, I want to continue browsing in Emacs...)

Is there a way to configure w3m so that, in this situation, clicking
on a URL uses browes-url instead?

Tom