Sunnyvale, Mountain View, and Palo Alto, CA.

I've been commuting for a good 8 months now and there are bike lanes on most of the streets. On the streets that there are no bike lanes, most drivers are courteous/knowledgeable enough to give cyclists lots of room when they pass. On the weekends some of the streets, especially in Palo Alto, are filled with roadies and various other cyclists. Its almost bicycling heaven here.