Calculated Earth is a collaborative effort by Malcolm Burke and Jonathan Burke and arises out of a piece of background research work that lead  them to the many freely available topographical data sources on the net.

The maps and animations are plotted using the June 2006 ETOPO2v2 data set from the US National Geophysical Data Centre.

The maps simply show graphically the selected height across the ETOPO2v2 dataset without interpretation or adjustment. So landlocked areas of the world that are below the selected level will show as being flooded regardless of being without a connection to the sea. No adjustments are made for tides.

Considering the flooding currently plaguing England, plotting the first few metres of sea level rise on this site should make you think about the scale of disaster we are facing if the polar caps continue melting.
http://calculatedearth.com