More good information about Creatine can be found here:
http://www.abcbodybuilding.com/creat...0and_facts.php
(I just love this site. Last week they completely rehauled and added all the cool graphics and pretty formatting..)
Creatine helps produce better results in the gym by allowing you to stress your muscles harder and longer, by giving your muscles more energy to work with. So.. more energy does = more mass. It's worth trying, anyway...