How to learn SEO? (for spanish speakers)

SEO (Search Engine optimization) its a kind of new discipline developed for the last years around the whole Search Engines Business. Over at Wikipedia we can read:

"Search engine optimization (SEO) as a subset of search engine marketing seeks to improve the number and quality of visitors to a web site from "natural" ("organic" or "algorithmic") search results"

I'm doing a research about SEO since september, learning deeply about this, so I suggest to read the new "ABigDoor, SEO y posicionamiento" (in spanish) blog daily to keep you updated and to involve yourself in the SEO world.

Thanks
Vic