The big winner
is Mitt Romney, with 51% of the Republican votes!
Who won the Dem race? Depends on the meaning of "win." Hillary got more votes (51% vs. Obama's 45%), but Obama edged her in delegate count (13 vs Hillary's 12). Caucuses have different rules than primaries; Obama's suggest is tied to his performance in rural areas.
CNN has results for both the Nevada and South Carolina contests here
(via Mark Byron