depends on which one you buy. Luka is bilingual and can sing very well in english., and all the vocaloids can sing in english, but you can barley understand them.
Assuming you are talking about the Japanese Vocaloids, I can say that the exact date is unknown. They might not even come at all.Several voice providers do not have the ability to speak fluent english, therefore, some vocaloids may not arrive in the US at all.The only two japanese vocaloids known having an english voicebank are Megurine Luka (who's eng voicebank was mainly targeted at Japanese users) and Hatsune Miku (her voicebank has yet to come, yet is is confirmed and currently in alpha stage)
you can find most of it on youtube, and some on specialty sites - but most animes have no official english versions of their songs. most will be fan-made or vocaloids.
there is a game based on vocaloids, but originally its a program.
Actually the first vocaloid was launched with another one at the same time so the first Vocaloids are Leon and Lola. The English Vocaloids. In the series of Japanese Vocaloid however, Meiko is first.
If you mean the first ever Vocaloids, the first two were MEIKO and KAITO. Answer Number Two: VOCALOID was announced in 2003 and released their first two VOCALOIDs in 2004. Those two VOCALOIDs were LEON and LOLA who sang in English and made by Zero-G Ltd. A few months later. Zero-G Ltd. made another VOCALOID called MIRIAM who also sang in english. A few months after MIRIAMs realese, Crypton Future Media made the first Japanese singing VOCALOID, MEIKO. 2 years later after MEIKOs release, KAITO was the first Japanese singing VOCALOID. This was the end of the original VOCALOIDs.
There is no leader. Vocaloid has no canon, either. Everything about the fandom is made up by the fans. Some consider Hatsune Miku the "leader" of the Vocaloids for her popularity, but this is just a private opinion.
Probably utauloids
There are, actually, two companies that release, and work on English VOCALOIDs. They are Zero-G, and PowerFX. Crypton has a bilingual bank: Megurine Luka.
Well, if your going in chronilogical order it goes: First generation vocaloids (MEIKO, KAITO, ...etc) Second generation vocaloids (Miku, Rin, Len, Luka...etc) Utauloids or UTAU's (Teto, Neru, ...etc)
In alphabetical order with released Vocaloids so far with some upcoming confirmed Vocaloids. English Vocaloids: Big Al Leon Lola Miriam Oliver Prima SONIKA Sweet Ann Tonio Japanese Vocaloids: VY1 "Mizki" VY2 "Yuuma" Akikoroid-chan Aoki Lapis CUL Gakupo GUMI Hatsune Miku Hibiki Lui Hiyama Kiyoteru IA Kaai Yuki Kagamine Rin Kagamine Len KAITO Lily Megurine Luka MEIKO Mew Miki (SF-A2 Miki) Nekomura Iroha Ring Suzune Ryuuto Tone Rion Utatane Pico Weatherloid Yuzuki Yukari Chinese Vocaloids: "Yayin Gongyu" - probably will not be the official name Spanish Vocaloids: Bruno Clara Korean Vocaloids: SeeU English Vocaloids: Leon, Lola, Miriam, Prima, Sweet Ann, Sonika, Big AL Japanese Vocaloids: MEIKO, KAITO, Hatsune Miku, Kagamine Rin, Kagamine Len, Megurine Luka, Kamui Gakupo, Megpoid Gumi, SF-A2 Miki, Kaai Yuki, Hiyama Kiyoteru.
There are a lot of VOCALOIDs. VOCALOIDs are now up to at least 45, and their are more than 60 voicebanks.