A soundtrack finally has been announced for Ambition of the Illuminus! It will also include some new music from Phantasy Star Portable. Set to go on sale in Japan on July 31, it will retail for 2730 yen. SEGA are also offering special bundles where you can buy Phantasy Star Portable and receive the soundtrack with it and other items like commemorative telephone cards and a system case.

Here's the track list (including strange misspellings of character names. <_<)

01. SAVE THIS WORLD - v MIX -
02. Shitenkaku
03. Old Rozenom City
04. Eathan
05. Habirao F.D.
06. Paracabana Coast
07. De Rol Le
08. SAVE THIS WORLD - REMIX Short Version -
09. Raia
10. Illuminus
11. Growl , From The Dark Faith
12. Paracabana Coast -pMIX-
13. Casino Volyale
14. MOTHER
15. Fight the Vicious Fate
16. SAVE THIS WORLD - REMIX Version -

In that first track, the v should be the Greek letter nu; I just can't make it display properly.