They are extremely cheap to maintain as compared to static sites (that require qualified personnel to update). They provide fast indexing and easy customization.
Drupal is a great choice! Well Done!

..and Thanks for the positive feedback. Glad I could help!

Nope, this info is for Google internal and exclusive use only.
And this is the reason for all those ambiguous PR estimates that float around the IM community

I see that the majority of links are to internal webpages. There is no point in restraining the link juice to flow freely within your own site. Of course there are some useless areas like Terms of Serives, Disclaimer (though not your case) that dilute the PageRank with no added benefit what so ever.

So, NO nofollow tag links in your site. Focus on directing PageRank from external surces instead and let your product pages as they are. PageRank sculpting is indicated when you whant to divert some of the link juice to very important pages on your site – generally those with high (at least above average) conversion rates.

Do you think we should no follow them?

If so am sure we would all appreciate a link to such resources – thanks in advance!

Thanks for this post, it was really helpful to me as I am just starting to plan my SEO strategy for my new website, grouvia.com. This came at the perfect time.

I have noticed that a lot of articles about SEO use more conventional websites as examples, such as corporate brochures and blogs. My site is essentially a Drupal-driven CMS site, and I have been assuming the principles work the same way, is that correct?

Thanks again.

Lisa