Yep. I herd of that in BemaniStyle.com and the DDR Guild @ Gaia. ^^;
Not to surpirzing, though. Just hope I will still play all of Bambee's songs, Space Man, and Little Kitty Mine. (Only time played at arcade is at Disneyland...)
I'm hoping they keep the Disconnected songs, Determinator, and Agent Blatant, and the songs you mentioned...also I read it from a link through DDR Freak.