Last night I watched the caucuses from my dinner table via the internets. And I used this handy piece from the Washington Post. The screenshot is from early in the evening before most of the results had arrived.
What is really nice is that the site refreshed every thirty seconds. Sometimes nothing happens in a county. But if something did, they used a nice white line within the county borders to indicate a county within which an update had occurred.
Credit for the piece goes to the Washington Post graphics department.