According to CQ, the Department of Homeland Security says that it should get 70 miles of border fencing built during FY 2007. The department says that the construction of the fence is now underway:

At the end of last week, new border fencing was being built at a rate of 2 miles a day, but before the fence could be built, DHS had to acquire land, conduct environmental assessments, design the fencing and follow federal contracting laws, Benson said.