Funny you should mention that, in about a week I'm planning to make public a frequency list collected from a corpus of over 40k Spanish news articles (I've been working on Langliter for a long time). Since I'm finding the lemma of every word in the corpus and I'm tagging each word with its PoS, it's actually a really valuable list. I plan to update the list quarterly as my corpus grows.

I'm currently only using it to calculate a modified version of the Dale Chall readability score. Figured people could make good use of it and it would be a good way to drive people the the site.