Social shopping site Plum District has raised $2.1 million in a first round of funding, according to a filing with the SEC. Like shopping sites Gilt, RueLaLa and Groupon, Plum District offers daily deals, but the site differentiates itself by catering its local deals–including day camps, groceries and spa treatments–to busy mothers. Backed by Vigran Ventures, the site launched in May and is currently available in the San Francisco Bay Area but has plans to expand to other major cities soon.