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ticho writes:

We've previously covered the Lightsail projects tribulations... Now there is better news.

Washington Post reports:

Since launching on May 20, the Planetary Society's solar sail prototype -- called LightSail and inspired by an idea Carl Sagan championed decades ago -- hasn't exactly had smooth seas.

A glitch made the tiny satellite holding the folded sail unreachable from Earth for a time. Even after communications were re-established, it took days to get the spacecraft to do the one thing it was sent up to do -- deploy its sail, proving that a propulsion system thinner than human hair could be packed away and unfurled safely in space.

On June 7, the Planetary Society reports, the sail finally unfurled.

Original announcement straight from Planetary Society can be found here.