Is Israel Preparing To Invade Gaza?

That would seem to be the message being put out at the moment:

Earlier Wednesday, the IDF said its aircraft struck Qassam rocket launchers in the northern Gaza Strip. Palestinian officials said two people were slightly injured in the strikes, near the towns of Beit Hanun and Beit Lahia.

Defense Minister Ehud Barak reiterated Wednesday morning his position that Israel "is approaching a large-scale operation ... in the Gaza Strip due to the continued Qassam rocket fire."

"One must understand that such on operation is not simple in terms of force [size], the length of time for which we will have to stay [in the Strip], and in terms of the operation limits that the soldiers will encounter," Barak told Army Radio. "It is very complicated."