Close to White Center which has McClendon's Hardware, El Paisano (best Mexican I've had in the states), Pho 99, Full Tilt. Love it. West Seattle has Elliott Bay Brewery, Mashiko's, C&P Coffee, Bakery Nouveau, Ace Hardware, Farmer's Market.

Terrain in West Seattle can be interesting. But once you are in WS it's mostly flat, with downhills/uphills to water.
http://www.seattle.gov/transportation/steepest.htm
High Point the highest point in the city is near my house. WS also has some of the steepest streets (some are not on this map either as they are secondary streets). Takes me 30-40 min to get to work on the north side of downtown and about 45-50 minutes to get home. Slowed down mostly due to hills/traffic combo. It's a steep ride home, but keeps you in shape. This way I can eat at those places I named above.

Some single track info:
http://www.seattle.net/entertainment...untain_biking/

It's not too bad to get to I-90 from WS. Early in the morning is better than afternoons though due to traffic and upcoming construction issues.
http://www.wsdot.wa.gov/projects/viaduct
Namely this one. But I think if you bicyle commute you won't have too much of an issue. Cyclists are going to have a much easier time navigating the streets than cars/buses IMHO.