After kokone's released from Internet Co, it looks like Yamaha will also releasing a new brand Vocaloid 3!
Meet Anon and Kanon! These school girl twin will be available starting at March 3rd!

Product information: http://www.vocaloid.com/news/products/vocaloidvocaloid3_library.html

Also check their bio and their demo song in their Official Page! 
Their voices is very refreshing, the demo song itself is very catchy! Can't wait for more demo songs and they released in the future >u<