NPR's Morning Edition had a brief story on carbon sequestration this morning (U.S. Eyes Burying CO2 to Battle Climate Change). The story focuses on researchers conducting carbon sequestration related experiments at the Rocky Mountain Oilfield Testing Center (RMOTC) in Wyoming (site of the Teapot Dome for you Presidential scandal enthusiasts). As it says in the story, the experiments at RMOTC are in the early stages and they are a couple of years away from injecting carbon dioxide.
My primary quibble with the story is the way it categorizes the opinions of environmental groups. The view expressed by the Sierra Club representative is the view of the Sierra Club and not necessarily the view of all environmental groups. I would argue that most environmental groups are still deliberating their position on carbon dioxide capture and storage. For more on the deliberations of environmental groups, I would recommend looking at the Climate Action Network (CAN) Europe website. CAN Europe brings together a large number of environmental NGOs to discuss climate change and climate change mitigation. They conducted a workshop on carbon sequestration that you can find through the link.