The first detailed characterization of a near-Earth binary (2000 DP107) provided significant insights into the formation mechanism, orbital evolution, and physical properties of the system. Near-Earth Asteroid (NEA) binaries are tidally evolved with synchronously rotating secondaries, providing constraints on asteroid mechanical properties (tidal Q and rigidity). It is expected that radar observations will permit measurements of orbital precession, with corresponding implications for the distribution of mass within asteroids.