According to the latest reports based on images such as the following, it seems that comet ISON has failed to survive it’s close encounter with the sun which will be a big disappointment for those in the northern hemisphere hoping to see a bright comet next week.
Note that the brightest part of the comet is no longer the head:
However, since this image, a later image shows it is still there:
But as of 29th Nov, reports are that it has substantially faded to a magnitude of around +2.9 with suggestions that if the comet reappears it will probably be a large diffuse object without the usual dense comet head, and with a magnitude of +5 which will be a disappointment to those in the north hoping for a bright comet for Christmas.