yea, I got from zenius-i-vanisher (credit!).
the description of pop'n 17 as shown at z-i-v is:
-Licenses and original music.
-Game modes that beginners and experts can enjoy
-Continuous events held through e-AMUSEMENT
-The color scheme of this game seems to be based on 'fashionable light purple'.
-Release date is [strike]February 2009[/strike] [color=red]4th March 2009[/color].
(edit @ 3rd March 2009)and... hey! tomorrow is the release date!!