A full-time minimum-wage earner working 40 hours per week earns $15,080 per year ($7.25 x 2080), earning about $1,257 per month in before-tax income.

The 2009 poverty threshold for a family with two members is $1,214 per month. Working for minimum wage will raise a family of two to just above the poverty line.

Sources:
Labor Law Center; Federal Minimum Wage Increase for 2007, 2008, & 2009, http://www.laborlawcenter.com/federal-minimum-wage.asp.
U.S. Department of Health & Human Services; Poverty Guidelines, Research, and Measurement, http://aspe.hhs.gov/poverty/.