A few days ago wanchan had this to ask about a semi-duplicate of this post:
"Anyone recognise the signature?
The art style is familiar but I can't place it (bit like vowzmen or bosshii)"
(the signature was http://img147.imageshack.us/img147/7124/picture17ih1.png)

That post has been deleted, but I still had it open in the pile of old tabs in my browser, together with this reply I never posted:

"神奈月 (Kannaduki - not the same as 神無月, though), which seems to be the stage name of a Japanese entertainer.

(Using Nihon-shiki romanization for Haduki's sake.)"

Combining 神奈月 with ポリフォニカ has got me the name 神奈月昇,
Kanna[d|z|dz]uki Noboru, who happens to be one of the illustrators for Polyphonica.

http://ja.wikipedia.org/wiki/%E7%A5%9E%E5%A5%88%E6%9C%88%E6%98%87
http://www.kisweb.ne.jp/personal/fullmoon/

If that's the right guy and we can decide what to call him we can give him an artist entry. Going by the precedence of us already have an artist kannaduki I'm tagging this as kannaduki_noboru for now.

Good job! Looks like this illustrator's surname is pronounced Kannatsuki, unlike the celebrity's. Renaming...

Doh! Didn't notice the lack of the dakuten on the tsu on the wiki.