According to The Anime Network’s Tweet, Sentai Filmworks has licensed A-Channel and UN-GO.
No release details have been announced at this time.
Update, Nov. 8th, UN-GO is to be available digitally soon and released on DVD and Blu-ray next year.
Update, Nov. 9th, A-Channel will be available digitally and on subtitled DVD next February.
Source: Anime Network’s Tweet, UN-GO Press Release, A-Channel Press Release