Here is the latest video of the seismic activity of the the moving lava in 4 D chart.  

There is some great pictures and articles on the pending eruption in Iceland in this online magazine from Iceland. 

http://icelandreview.com/news/2014/08/27/possible-eruption-under-bardarbunga

There has been another eruption.  The visuals on the web cam has been stunning. 

http://www.livefromiceland.is/webcams/bardarbunga-2/

The first fissure eruption died down and researchers were able to get samples.  The sample only had about 2% sulfur in it, only this means the magma had time to disburse it's sulfur before it broke through the surface.  This second eruption is in the same area and is releasing more magma this time.  The rift is getting wider as the North American Plate continues to move. There has been over 400 earth quakes in 24 hours in this area. This is about 20 years of movement in a short time.  As we know from California that the movement is usually in fits and starts, not a continuous smooth movement.  The fissure eruption is about a mile long and growing.

The dike is continuing to move north and is interacting with a second volcano, Asjkia.  If the dike reaches all the way to Asjkia all bets are off. There is now seismic activity on it's south rim.  This volcano's chamber contains explosive magma that will react with what is in the dike. This is one of the large volcanoes.

Bardarbunga is continuing to have an subglacial eruption. The weather is bad because of the hurricane is off it's coast right now, which is keeping the researcher from flying over the glacier to look for clues.  There has been strong seismic activity there. The worry is a glacial flood of ice and water. This glacier is about 500 to 800 meters thick and is the largest in Europe. It can cause quite a flood with out making much of a dent in it. But the last time they looked the ice around the volcano was now full of dents and cracks. 

Iceland is worried about this one because of the amount of magma that is moving and the pressure it is under.  It is also in an historical dangerous place for eruption. This is where the really bad ones take place. 

The links in the above comments are continually updated in real time so you can check back and see how the magma is moving from the seismic activity and how deep it is being fed from. .