Kate Wong at Scientific American has a nice writeup of the continuing back-and-forth about the "hobbit" skeletal remains found in Indonesia. The two theories are either that the bones belonged to a Homo Sapiens suffering from secondary microcephaly, or belonged to a previously unknown hominin (for example, possibly a remnant Homo Erectus?). If the second were true, the recent age of the bones suggested that we humans have had close relative species up to nearly the dawn of history. Kate seems to be weighing on the side of "abnormal human" rather than non-human.
Take a look at the comments, too- Kate has a great readership.