When I do http://localhost/?post_type=session it shows up. The problem I am having is that it doesn’t show the day, and when it paginates there are no controls showing up to go to the next page.
I am a WordPress newbie, but It appears this problem is due to the way add_meta_box is being done. For version 0.5.2 conference-schedule.php on line 84 there is the line:
$this->add_meta_box( 'cs_schedule_metabox', __( 'Schedule', $this->name ), 'schedule_metabox', 'session', 'normal', 'core' );
Take that line and move it to the admin_init function on line 278. Then it will show up again. At least it does for me.
I think this is related to this issue: http://wpdevel.wordpress.com/2011/12/07/do-not-include-wp-adminincludestemplate-php-to-get-add_meta_box/