Film Music Magazine; Leading American professional magazine 

Film Score Rundowns : Billl Wrobel's cue-by-cue analysis of classic film, television and radio scores

Filmtracks - probably the best and most complete soundtrack review web site - also includes composer tributes, audio clips etc.

moviemusic: soundtracks cd reviews.

Film Score Monthly: American web magazine with a good article about how to become a Film Composer 

http://www.soundtrack.net/ Good site with a lot of CD reviews and composers interviews and bios

Sound America: TV Themes, Soundtracks, etc... They are all there for you to download in wave format 

ASCAP:   Music Copyright Society 

BMI:    Music Copyright Society