IA's male version is IO.
You can download IA Vocaloid songs from Nicosound. This site is basically the audio version of NicoNicoDouga. On this site you can download all of IA's songs that have been posted on NicoNicoDouga.
Lia, a famous Japanese singer. She's the one who sang the Angel Beats! opening and something for AIR, I forget what.
Vocaloid fans like Vocaloid. Vocaloid fans are located around the world. Vocaloid fans also have a tendency to like Japanese animation (anime) and comics (manga).
Piko is the name of both the Vocaloid and the voice provider, who is naturally not a Vocaloid.
No Teto is not a Vocaloid. I have heard before that She was made to be a prank. She is mistaken to be a Vocaloid. She sounds like a Vocaloid(y) software.
People are not sure if the second VOCALOID for the 1st generation was LEON or LOLA. They were both released on the same day. For VOCALOID 2nd generation, Hatsune Miku was the second VOCALOID after Sweet ANN. Lastly the VOCALOID 3rd generation, VOCALOID SeeU is the 2nd after MEW.
Kenmochi Hideki is the maker of vocaloid.
No, Akiakane is a Nico Nico Singer; not a Vocaloid.
Yes. Criticism is everywhere. You can find it on Youtube Videos, Vocaloid communities, ect.
No, Vocaloid is not an anime. Vocaloid is a singing voice synthesizer software that allows users to create songs and vocals using virtual characters. However, Vocaloid characters have been featured in various anime and manga series.
Akita Neru ain't a Vocaloid from the start.