  Due to their extremely small luminosity compared to the stars they orbit,
planets outside our own Solar System are extraordinarily difficult to detect
directly in optical light. Careful photometric monitoring of distant stars,
however, can reveal the presence of exoplanets via the microlensing or
eclipsing effects they induce. The international PLANET collaboration is
performing such monitoring using a cadre of semi-dedicated telescopes around
the world. Their results constrain the number of gas giants orbiting 1--7 AU
from the most typical stars in the Galaxy. Upgrades in the program are opening
regions of ``exoplanet discovery space'' -- toward smaller masses and larger
orbital radii -- that are inaccessible to the Doppler velocity technique.
