Well you might want to look at other points of search engine optimization to make sure you are doing all that you should. Make sure you have like minded web sites linking to you, submit yourself to the search engines (although some say you do better if you let them find you, just a side personal opinion there) and make sure you have plenty of good content.
Might want to check out some of the tools mentioned here too:
http://www.lunarpages.com/free-webmaster-tools/Hope that helps!