My preferences would be: MissingLink Twilight Quaquaversal ReDeveloping (last choice only because previous talk was on Perl 6) > http://damian.conway.org/Seminars/MissingLink.html > http://damian.conway.org/Seminars/Quaquaversal.html > http://damian.conway.org/Seminars/ReDeveloping.html > http://damian.conway.org/Seminars/Twilight.html