I have recently discovered two geography blogs that are related to Google products - Google Maps Mania and Google Earth Blog. The latter blog had a very interesting piece about a member of the "Google Earth Community" named bzoltan who created a template showing the effects of a 100 meter rise in sea level from global warming. This is along the same lines as lori's piece, 15 inches, at Truth & Progress. bzoltan's template can be accessed here. (You need to load Google Earth in order to view this.)
For those of us in Massachusetts, the results of a 100 meter rise in sea level are stunning. Virtually every place within Interstate 495 - as well as Cape Cod and all of southeastern Massachusetts - disappears. Marlborough and Hopkinton become seaside communities. The Pioneer Valley becomes a fjord as far north as Greenfield. Stunning stuff.