Un-Go is based on Meiji Kaika Ango Torimono-chō by 20th century novelist Ango Sakaguchi. Detective Shinjūrō Yūki and his sidekick Inga solve mysteries in ways even more mysterious than the mysteries themselves.
A Channel is based on the four panel manga by bb Kuroda. The story is school days slice of life revolving around four friends: Tooru, Run, Yūko, and Nagisa.
Perhaps strangely, this news came in through The Anime Network's Twitter account, but was confirmed by other NekoCon goers. If you're near Hampton Roads, VA, the con runs through tomorrow!