Hatsune Miku: Project Diva Ver. 2.5 Celebrates Sonic's Birthday
In honor of the 20th anniverary of the Sonic the Hedgehog series, a new Hatsune Miku: Project Diva Ver. 2.5 module features the virtualoid singer dressed as the blue guy. There's also a Fei-Yen module supervised by Virtual On mecha designer Hajime Katoki and a Racing Miku 2011.
Sega has Ryo (supercell) and Dixie Flatline collaborating on a song called Sekiranun Graffiti (literally "Thundercloud Graffiti"). You can get a sampling of the song at the official site.