links for 2009-04-21

"…copper – which is everywhere around you – will be gone in about 61 years; antimony – widely used in medicines – will be depleted in 20 years; while indium, rhodium, platinum, or silver – which are present in many essential consumer electronics – won't last much longer. And those estimations are only valid if we manage to consume half of what we are consuming now."

Hard to find unless you get a hold of the training CD (which doesn't contain a number of these tutorials) or know how to scour the internet well.