Hey guys, I interviewed with RobbC (hey Robb!) and currently live near Pomona (in Loma Linda) where I am a graduate student. I am supposed to begin next year with you guys, but am requesting a one year deferment to help start a local medical clinic.
Anyhow, regarding your questions about where to live, I will echo what Robb has said. Pomona and Claremont are not great areas to live in. Chino Hills and San Dimas are both nice (San Dimas makes your drive to the beach a little shorter!!) As you will soon learn about how traffic works in SoCal, we don't talk about distance in miles, we talk about it in time. All of the LA surrounding areas have tremendous rush hour traffic (all heading into LA in the morning and out of LA in the evening). Therefore, the best direction to drive at either of those times is the opposite one. So, it is best to live west of Pomona so that at peak times you are driving against everyone else in SoCal.
San Dimas is a pretty cool place that puts you near a lot of hip places surrounding LA.
My email is attached on my profile, so feel free to write me with other q's or just gab! Welcome to COMP and SoCal, and if my deferment isn't granted I will see ya next year!