  Clio is an adaptive-optics camera mounted on the 6.5 meter MMT optimized for
diffraction-limited L' and M-band imaging over a ~15'' field. The instrument
was designed from the ground up with a large well-depth, fast readout thermal
infrared (~3-5 micron) 320 by 256 pixel InSb detector, cooled optics, and
associated focal plane and pupil masks (with the option for a coronograph) to
minimize the thermal background and maximize throughput. When coupled with the
MMT's adaptive secondary AO (two warm reflections) system's low thermal
background, this instrument is in a unique position to image nearby warm
planets, which are the brightest in the L' and M-band atmospheric windows. We
present the current status of this recently commissioned instrument that
performed exceptionally during first light. Our instrument sensitivities are
impressive and are sky background limited: for an hour of integration, we
obtain an L'-band 5 sigma detection limit of of 17.0 magnitudes (Strehl ~80%)
and an M-band limit of 14.5 (Strehl ~90%). Our M-band sensitivity is lower due
to the increase in thermal sky background. These sensitivities translate to
finding relatively young planets five times Jupiter mass at 10 pc within a few
AU of a star. Presently, a large Clio survey of nearby stellar systems is
underway including a search for planets around solar-type stars, M dwarfs, and
white dwarfs. Even with a null result, we can place strong constraints on
planet distribution models.
