The major expedition heading South this season is a Slovak attempting the first solo and unsupported crossing of the Antarctic. Details below
Peter Valusiak's Solo crossing - 2800 km
Slovak Peter Valusiak will attempt a solo, unassisted (no resupplies) crossing from Berkner island to McMurdo, via the South Pole. Peter is a true veteran; in 1998 he did a 118 days crossing of the Arctic Ocean from Russia to Canada with a team of Russian explorers. The expedition received no resupplies - the only reason they didn't get the first unassisted unsupported crossing tag, was due to an emergency evacuation.
UPDATE - Expedition abandoned. No reason has been given, but it's a shame that the one exciting venture of the year is over before it's begun.