Tantalum - Here is another rare metal I had not heard of, not sure it will ever be the next thing but interesting article. Seems to come from the Congo like majority of the cobalt.
http://investingnews.com/daily/reso...ls-investing/tantalum-investing/coltan-facts/
Another very recent article talking about a possible Cobalt boom:
http://investingnews.com/daily/reso...nvesting/cobalt-investing/cobalt-mining-boom/
