There´s a singer from Melbourne called Penelope Swales and her songs are about blatantly political stuff but very few of them are specifying the message. Not all of her stuff is original but she sings an attitude to life and one that is divergent from the official line, which, to me, is protest singing.

Two young American protest singers come to mind and I hope I can remeber their names now:

Dana Lyons - he writes and sings very clearly message giving songs, some of them protesting and some messages of hope or values in general. I like his music.

Casey Neil - he wrote "We´re dancing on the ruins of multinational corporations" and other songs of a kind of "punk-attitude, folk-sound". I don´t know if he wrote it, it kind of sounds older than him but he sings Hurrah for the Riff-raff.