Lyon Real Estate
Check out this posting: http://www.trulia.com/voices/Home_Buying/West_Sacramento_The - the guy Rob in that posting is very knowledgable about this area so you might want to touch bases with him.
I live at The Rivers and love it (http://www.liveattherivers.com/). It's close to downtown and has arguably one of the best parks around that's private for the residents, nice pools, etc. All W. Sac seems to have taken a beating on price so you'll get more for your money now. The Rivers is VERY close to downtown. This land used to be a golf course so you get the best of both worlds - with mature trees and brand new houses. Off Jefferson is much bigger than The Rivers, new school, community recreation center, stores. It's farther from downtown but is it's own little community. I don't know much about the schools but if I had to guess they are better off Jefferson but you might want to ask around more about that.
West Sac (as it is commonly referred to around here ) is on the west side of the Sacramento River from the city of Sacramento. It is home to the Sacramento River Cats triple A baseball team. There are a two newer planned communities. Bridgeway Lakest and Southport as well as a lot of older housing.
Here is a link for the city of West Sacramento Community Life information site: