sundaridevi - 6:57 pm on Dec 23, 2011 (gmt 0)
The footer links won't hurt you unless you have a link in the footer that also has a link in the main nav and you use different keyword text for the same url (or alt text if the main nav is an image).
The major issue is the way you are flowing your page rank across the pages. Nofollow doesn't stop the page rank leakage, but it doesn't leak as much as a dofollow link either, it's something like half as much.
The best practice would be to just footer index pages that are key pages that you want to have the best SERPs. From those pages link out to a second tier of important pages. The footer should not become a site map.