Early Episode III Synopsis (spoilers)
TFN points out that the last entry in the Clone Wars timeline on the Official Site has a summary of Episode III on it- nothing we did not know already, but the first concise and official summary yet released, and handy for posters to refer to, especially new ones.
"After three long years of relentless fighting, the Clone Wars are nearly at
an end. The Jedi Council dispatches Obi-Wan Kenobi to bring the deadly
leader of the Separatist droid army to justice. Meanwhile, back on
Coruscant, Chancellor Palpatine has grown in power. His sweeping political
changes transform the war-weary Republic into the mighty Galactic Empire. To
his closest ally, Anakin Skywalker, he reveals the true nature of power and
the promised secrets of the Force in an attempt to lure him to the dark
side. "