Okay. It was just today [June 28, 2014] that I checked the links on a whim for VocaloidNext. The official site and twitter is no longer present. The site was apparently sold off, I am guessing in December 2013 or rather it shut down at that time and the space was taken around March 2014. I don't recommend visiting the link as it is now an adult space; nothing explicit (due to Japans laws), it is just recommended that is now a dead space and it should be avoided. You can check the archive for any left over information (which is what I should have done months ago).
I will be changing the status of Ring and Lui to cancelled, unless someone can find information about them that I can add to the page.