<FORM name="passwordform" METHOD=POST ACTION="http://lists.berlios.de/mailman/admin/foo-devel/">
<INPUT TYPE=password NAME=adminpw VALUE="xxxxxxxxxxx">
<INPUT TYPE=SUBMIT name="request_login" value="Let me in...">
The ACTION url then simply needs to be adopted to the one used in your mailing list and the VALUE needs to be set to the password for the mailinglist. Finally just save the file to some place on your harddisk and bookmark it. Voila, after a click on the bookmark you will be brought directly to the configuration page of mailman, no more password required. This little dirty trick might of course work for other forms too, just copy&paste them out of the original webpage, fill out the VALUE parameter and add on onload event.