here a newer image which shows some comet activity as well:

Comet on 10 January 2015 – NavCam
This four-image mosaic comprises Rosetta navigation camera images taken from a distance of 27.5 km from the centre of Comet 67P/Churyumov-Gerasimenko on 10 January. The image resolution is 2.3 m/pixel

from http://rt.com/news/225519-rosetta-comet-first-results/

Mapping new world: Rosetta reveals first results of host comet probe (PHOTOS)



and



read the linked article for more info

here the link to a recent article on the discoveries from rosetta: http://www.space.com/28337-rosetta-comet-spacecraft-strange-discoveries.html
as a teaser an image from the article

]a flood of pictures and news have been released in the last few days, here some:

Comet rotation axis



The blue arrow indicates Comet 67P/Churyumov–Gerasimenko’s rotation axis, and the red and green arrows display its equatorial x- and y-axes, respectively (with x according to the current but temporary zero longitude definition that passes through boulder Cheops in the Imhotep region).

Crack extension in Anuket



This OSIRIS narrow-angle camera image shows part of a large fracture running across Comet 67P/Churyumov–Gerasimenko’s neck, in particular where it has left Hapi and is extending into Anuket. In this orientation, the Seth region is at the uppermost left and Hapi in the lower left.

an article giving more info on the crack can be found here http://www.9news.com.au/world/2015/01/26/14/42/comet-might-split-in-two-after-space-probe-finds-huge-crack-in-surface

for those who like to read http://www.scientificamerican.com/article/strange-comet-discoveries-revealed-by-rosetta-spacecraft/

but for all a new picture:



Comet on 21 January 2015 – NavCam
...from a distance of 27.9 km from the centre of Comet 67P/Churyumov-Gerasimenko on 21 January. The image resolution is 2.4 m/pixel ...

they are still searching for philae:



Lander search area
An example of the OSIRIS narrow-angle camera mosaics being used to search for Rosetta’s lander, Philae. The image is a slightly cropped 2 x 2 mosaic comprising images taken on 13 December 2014 from a distance of about 20 km to the centre of the comet. The lander, about 1 m across – the size of a household washing machine – would measure only about three pixels across in these images. The team are searching – by eye – for a set of three spots that correspond to the lander shape, but with the region strewn with boulders it is soon easy to identify multiple sets of three spots.

comet aliens took it and are reverse engineering it to come for us!

seriously feel bad for them having to go over that pixel by pixel hoping for a lucky break.

yes, it's a pain but they have some other data as well, eg



Philae orientation visualisation
The likely orientation of Rosetta’s lander, Philae, in a visualisation of a topographic model of the comet's surface.

here an image released on 30/01/2015 3:00 pm

Philae descends to the comet
Series of 19 images captured by Rosetta’s OSIRIS camera as the Philae lander descended to the surface of Comet 67P/Churyumov–Gerasimenko on 12 November 2014. The timestamp marked on the images are in GMT (onboard spacecraft time).