We'll update this list as it grows.
Los Angeles/OC:
Amoeba
Tower Records (on Sunset)
Headline
Vinyl Fetish
Backside Records in Burbank
Bionic in Cypress and Huntington Beach
Dr. Strange in Alta Loma
Kaos in Covina
Poo-Bah in Pasadena
Radiation in Anaheim
Vinyl Solution in Huntington Beach
Other Cities:
Streetlight Records (Santa Cruz, CA)
Green Noise (Portland, OR)
Singles Going Steady (Seattle, WA)
Online:
Interpunk.com