Ok. We all know that ehow.com is not exactly the most reliable/legitimate source, but the information provide hear is indeed true. I used this article since it was simple to understand compared to various science journals.
What you can get out of this article is that Kombu or seaweeds contain a high level or iron and would be a great addition to your diet; especially if you are vegetarian.
When it comes to Kelp, the primary introduction seems to be tablets, but try including it as a broth or use strips of Kombu and add it to your beans!
Seaweed is something vegetarians should have a STRONG interest in.