Since Anteater (2010-11-07) [[ns:page?do=my_action|Do stuff]] is supported. See http://www.dokuwiki.org/tips:links-to-dokuwiki-commands if you need it in older versions of DokuWiki.
Thanks Michael, I hadn't spotted that Anteater supported it. Nice :-)I'm just about to do some work on the master, so upgrading is really simple.
Chris -- DokuWiki mailing list - more info at http://www.dokuwiki.org/mailinglist