I wish that the "nixtamal" precooked form of corn would be more widely available in Europe. It really is a superior product compared to plain corn flour - I didn't really like most corn-based dishes before I tried it.
Of all places I could think of spreading the word HN was definitely the last place :D
Masa Harina is becoming pretty easy to find though. Most asian (for some reason) grocers carry it.
More interestingly, I was extremely surprised to discover that nixtamal is completely absent in South America, despite the high consumption of corn products. I lived in Peru for a time, and buying nixtamal was impossible, not one vendor, physical or online, carried it.