I like this, but I think I like the original scans colors much better. You vector well, but I think it would have looked even greater if you shadowed it like in the original scan, like used a gradient on her hair or something, and stayed with the gray-ish tone background.
And funny, why is vocaloid stuff under redjuice over at AP? 0.o I would have loved to see those scans earlier, but they're in the wrong category. >> lol. good thing you put your link up, I never would have found them. :) Thank you!