I played around with this a little and couldn’t get the is_single to work either. A work around I found was to create a new category, add the post you want to that category and then do something similiar to before but change it to in_category. This way might be better since you can add other posts to that category in the future instead of hard coding it.
<?php if (in_category('3')) { ?>
//nothing happens
<?php } else { ?>
// the code for you meta info
<?php } ?>
Let me know if this works. I am not real familiar with word press yet so I could be way off here.
-Scott
