  We are developing photon-counting cameras employing cryogenic arrays of
energy-resolving TES (Transition Edge Sensor) pixels. These are being tested in
ground-based instruments, but will have their greatest impact when employed on
space platforms, where they can cover the 10micrometer-100nm range with high
time- and moderate energy- resolution. Here we summarize briefly existing
device performance, current directions in array camera development and
anticipated capabilities.
