Note that:Werebat said:"I get a full round of sneak attacks, then hide in plain sight (as a free action)!"
1) The Shadowdancer needs to be near shadows to do this (and if this is from shadowy illumination, that could make sneak attacking difficult)
2) Only the first attack could be a sneak attack, since the Shadowdancer is no longer hidden after the first attack.
3) Hiding involves at least a move action (i.e. from the RotG: "you hide as a move action or as part of a move action"), so this could not be combined with a full attack.