I have a couple mixes of the song:

The one by ANIMETAL
Piano Squall's rendition
The original and tv size
and the acapella by mike pistons.

Any others I should know about (plus links if at all possible)?

I kinda want these. Not gonna buy em though...

*Opens Photoshop and buys more photoprinter ink*

I say it symbolizes Gendo being excluded from the giant gestalt-thingy of souls the giant mega-freaky-rei/lilith tries to make.

Drill arms? Really? Sad part is, fanartist or not, he may be right...