Comet ISON has brightened recently. Comets can be unpredictable, so we can't know exactly how bright it will get. But it is worth taking a look.
It will pass behind the sun on November 28th, the best view is likely to be sometime between now and the 28th. If you want to view the comet the following are good resources:
On November 18, there was information about Comet ISON on spaceweather (http://spaceweather.com/).