The Certification of web skills is an interesting topic, and one that is close to my heart.
I have recently embarked on the CIW Associate course (
www.ciwcertified.com) and bought the CIW Master Web Designer course to do upon completion of the Associate.
In retrospect, I am not too sure how much this will really benefit me as I am not even studying the Web design bit yet and have already learnt basic HTML through self tutorial e.g. trial and error. I know this is only a small proportion of what I will need to learn but the best stuff I have learnt has been from WHT

and other 'informal' sources such as advice from professionals etc.
Indeed experience via any methods be it formal training, coding for personal Web sites etc. is the key and building up a portfolio is a good idea.
That said, formal training schemes and certifications also have their benefits such as nipping bad scripting habits in the bud and learning the right way from the start.
It's the actual usefulness of the certification that concerns me. Will I be any better off or break into the industry sooner by holding the "I Can" certificate?
I think that anyone looking for certificates should be careful when as a lot of sites glorify their certifications, practically saying 'this will be sure to get you work.
It would be interesting to hear peoples thoughts and feelings on this - particularly any opinions on the CIW course range.