Its not often I get a paper into Science (although admittedly I’m last author) so I’ll mention it here: Significant Warming of the Antarctic
Winter Troposphere J. Turner, T. A. Lachlan-Cope, S. Colwell, G. J. Marshall, W. M. Connolley, 31 march 2006, v311. The paper is mostly observational, I did a little bit of looking at the GCMs, with inconclusive results.
So there it is. Don’t over-interpret it. Oh, and see-also the BBC take.
[Update: this is now up on RC in slightly expanded form; so you can choose where to comment!