I hold out little hope for an Ibara port any time soon. Or MMP, or Ibara BL, etc.
They might all roll onto the 360 eventually though, since Death Smiles is being released by them. People quickly forget that IRONICPUN and KANAFUN are being published by 5pb and Cave's first actual published game for the 360 is.. Death Smiles.
Fuck Ibara (easily the worst Raizing game, but then I've only played the PS2 version), if I invest my money in a Japanese xbox I want all the genuine new Cave shit and maybe Muchi Muchi Pork... wouldn't say no to Ibara 2, either, though.