  X-ray binaries in the Milky Way are among the brightest objects on the X-ray
sky. With the increasing sensitivity of recent missions, it is now possible to
study X-ray binaries in nearby galaxies. We present data on six luminous
sources in the nearby spiral galaxy, M101, obtained with the Chandra ACIS-S. Of
these, five appear to be similar to ultraluminous sources in other galaxies,
while the brightest source, P098, shows some unique characteristics. We present
our interpretation of the data in terms of an optically thick outflow, and
discuss implications.
