For Orthodox Jewish mothers with small children, the Shabbat can be challenging. The answer, for many communities, is the establishment of an eruv (discussed previously here, in passing). This San Francisco Chronicle article details the history behind Berkeley, California's unique instance. This isn't the first time an eruv has been attempted in the Bay Area: the failed effort to create one in Palo Alto was covered by the Chronicle, as well as the Jewish News Weekly. Berkeley isn't the only United States city with an eruv—the Boston eruv maintains a large list of domestic and international eruvim—nor is it the city with the most unusual eruv, or even the largest. Inevitably, perhaps, there's a blog entirely dedicated to the subject of eruvim, and vigorous commentary on the subject from several others.