As Centurion said, dont worry about the Writing. Everything else looks fine. I got into University of Maryland, which I believe is harder than your average state school to get in with a 670 Reading, 590 Math, and 610 Writing (yeah, I know Im bad at standardized tests, no need to remind me). Granted, I didnt get any academic scholarships nor get into the Honors program, but I did get in. And I had friends who got in with much lower scores.

Also the SATs are one factor that colleges look at. Your background, grades in school, the courses you take, and your resume all count for something. So if you have really bad SAT scores and a great resume, you will get in. No you wont get into Ivy-League schools, but then again, they are pretty overrated, IMO.