|Philae Lander as it will look as it departs Rosetta for the landing. Picture: European Space Agency|
You can watch the separation coverage from the ESA mission control room here:
If you would like to follow the technical details more closely, there is a very good forum on NASA Spaceflight.
Rosetta was launched in March 2004, and journeyed for 10 years to rendezvous with Comet 67P in August this year. It then proceeded to photograph and map the comet in the search for a good landing site.
There's much more your can read about the mission on ESA's Rosetta website.
As I am about to post this, the Philae lander should have separated from Rosetta. We have to wait about 28 minutes before we will receive the corresponding transmission.