Vocaloid, Has anyone ever head of these synthesized voice programs? Options

[Ranma]

Vocaloid is a singing synthesizer application software developed by the Yamaha Corporation that enables users to synthesize singing by typing in lyrics and melody.

^Stolen from Wikipedia^

Anyway, here are some vocaloid examples.

Love is war - Singer: Hatsune Miku

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The world is mine - Singer: Hatsune Miku
http://www.youtube.com/watch?v=Qe_SDakpPx4

Servant of Evil - Singer: Kagamine Len

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I like you I love you - Singer: Kagamine Rin

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The never ending story - Singers Megurine Luka and Hatsune Miku
http://www.youtube.com/watch?v=TaSZ0siQjXA

Double Lariat - Singer: Megurine Luka
http://www.youtube.com/watch?v=rXNH8TEP8vM

The disappearance of Hatsune Miku - Singer: Hatsune Miku (It's a sad song T_T)
http://www.youtube.com/watch?v=_xtEy951Dic

Rotten girl, grotesque stalker - Singer: Hatsune Miku
http://www.youtube.com/watch?v=xGThHuZ3lBQ

Uninstall - Singer: Kaito
http://www.youtube.com/watch?v=k0uU2PZVfM8...feature=related

Dark Woods Circus - Singer: Various
http://www.youtube.com/watch?v=AU6PL0LH4_Y

Magnet (LIVE CONCERT) - Singers: Luka and Miku
http://www.youtube.com/watch?v=slM1T6HF5jw

Trick or Treat - Singers Rin and Len
http://www.youtube.com/watch?v=Pb6fSiMBbv4

And there are a LOT more.