Crypton has earlier updated the Rin/Len Append site with more samples and you can listen to the songs below.
Hello Nostradamus – Rin Power (Warm, Sweet), Producer – Rin&FutureNow (CapMiraP)
Tsumugi Uta – Rin Sweet/Len Power, Producer – DATEKEN
Renraku Mada – Rin Power, Producer – LiveP
Shuujin – Len Power (Cold, Serious), Producer – ShuujinP
Rin/Len Append will be released in late December 2010 at a price of 16,800 yen and you can pre-order the software over at AmiAmi (ships internationally).