  We present observations of six late-type members of the young cluster IC 348
detected at 24 microns with the Multiband Imaging Photometer for Spitzer(MIPS).
At least four of the objects are probably substellar. Combining these data with
ground-based optical and near-infrared photometry and complementary
observations with the Infrared Array Camera (IRAC), we have modeled the
spectral energy distributions using detailed models of irradiated accretion
disks. We are able to fit the observations with models using a range of maximum
grain sizes from ISM-type dust to grains as large as 1 millimeter. Two objects
show a lack of excess emission at wavelengths shortward of 5.8-8 microns but
significant excess at longer wavelengths, indicative of large optically thin or
evacuated inner holes. Our models indicate a inner hole of radius ~ 0.5-0.9 AU
for the brown dwarf L316; this is the first brown dwarf with evidence for an
AU-scale inner disk hole. We examine several possible mechanisms for the inner
disk clearing in this case, including photoevaporation and planet formation.
