As part of their 15th anniversary celebrations, Lantis has announced a 20 minute medley of 42 anison songs, all sung by Lantis artists, to be released on 8/27. In addition to Kiiyan, Kuribayashi Minami, JAM Project, Chihara Minori, Hyadain, Faylan, ZAQ and more!
Songs will come from such series as Love Live, Lucky Star, The Melancholy of Suzumiya Haruhi,
A highly condensed (and seriously annoying — very hard to listen to) 3 minute version is up on NicoNico. Once the YouTube video is up, will link to it.