It was minor news a few weeks ago in the US, but it was hard to see, mostly visible just before dawn.
There are several news items about it from Australia and NZ, and here is one from Germany:http://www.spiegel.de/international/0,1518,461686,00.html
Since the end of last week, the comet has been visible at night in the southern hemisphere; before that, its flight path was directly in front of the sun, which made it invisible to observers on earth.
The comet is currently delighting astronomy fans across the southern hemisphere, from New Zealand and Australia, to South America and Southern Africa. Two weeks ago it was possible to see the comet in Europe, particularly at dawn.