Bright point sources associated with extragalactic AGN and radio
galaxies are an important foreground for low frequency radio
experiments aimed at detecting the redshifted 21cm emission from
neutral EOR hydrogen. The frequency dependence of the synthesized beam
implies that the sidelobes of these sources will move across the field
of view as a function of observing frequency, hence frustrating
line-of-sight foreground subtraction techniques.  We describe a method
for subtracting these point sources from dirty maps produced by an
instrument such as the MWA. This technique combines matched filters
with an iterative centroiding scheme to locate and characterize point
sources in the presence of a diffuse background. Simulations show that
this technique can improve the dynamic range of EOR maps by 2-3 orders
of magnitude.