The Systems Infrastructure team assembles, tests, and provides complete sensor network solutions containing both exploratory and hardened components, from high-level applications and analysis tools, down to hardware at the sensor platform level. Recent significant progress is seen in SensorBase and ESS2 at the database and application levels; in disruption-tolerant data delivery and system control software; in auto-ranging and self-configuration acoustic platform software and in energy harvesting (heliomote) and low-power energy-aware microserver platforms (LEAP).