Le Guin is one of my favourite authors... good to see there are some other Aspie fans of her work...
IMO this adaptation could be amazing, or it could be awful. I believe i heard that it was not going to be a totally literal adaptation, but that it is a combination of elements from 2 or more of the Earthsea books... not sure what i think of that... i've heard enough about the Sci-Fi Channel miniseries to definitely not want to see it...
I very much doubt that any studio would ever attempt an adaptation of "The Disposessed", or that one would even be desirable, or capable of being any good... it's a philosophical/political thought experiment, told in bits of backstory and private thoughts of characters, not through action, and IMO that sort of thing really isn't profitably [artistic, not financial sense of the word] filmable...
Earthsea is probably the only thing of hers i'd want to see a film of...
psych: "The Dispossessed" is by far the most explicitly political of ULG's novels, but several of the others set in her Hainish/Ekumen universe have sociopolitical themes and elements, notably gender politics in "The Left Hand of Darkness" and slavery and colonialism in "Four Ways to Forgiveness" (whose twin worlds, Werel and Yeowe, form an unstated but obvious contrast/parallel to Urras and Anarres... i'd love to see her write something in which an Anarresti comes to Yeowe, or vice versa...), and there are similar themes covered in several of her short stories, as well as more scientific/evolutionary/ecological themes...
IMO none of the other Ekumen-universe stuff i've read is on the same level as "The Dispossessed" for political relevance or for quality/construction of writing, but it's still worth reading...