I edited this video on windows movie maker uploaded to youtube on August 1, 2008: with Miku Hatsune, MEIKO, KAITO, Rin Kagamine, and Len Kagamine.all of the clips have Len in it. Archived: link
I heard somewhere that Kasane Teto was becoming a Vocaloid o something... Huh, maybe it was an April Fool's joke o something... But I hope it's okay if I post this!