Most of Llorca's films are available to view for free (without subtitles at the moment, but PLAT are due to launch an English site soon) here. I'm intending to write something about his films once I've watched a few more of them.
I've drifted off course a bit in the last week. I will return to El futuro, as previously indicated, but I've also finished the Pere Portabella boxset and am working out how to write about that collection of films.