Frank Klepacki, creator of the music for all C&Cs before Generals, and now working with other former Westwoodians, posted an update on his site
yesterday. Here's the part relating to C&C:
C&C SERIES UPDATED IN JUKEBOX:
Frank has finally come across some tunes you guys have been asking about, and now we have 'em posted! Tension, Untamed Land, Red Sky, Storm Coming, Tib Sun options Screen, Firestrom options, and Map screen themes!