A lot of interesting-and humorous-replies. It's nice to see that the lower-value metals like copper and silver aren't neglected.
In response to jdrakeh: Remember that a lot of treasure hoards are created from wealth stolen from other places. If copper and silver coinage are more common than gold or platinum, it makes sense that these metals would crop up in fairly large amounts in monster treasure hoards. And even the wealthy in a fantasy setting would need copper and silver to pay their regular expenses-servants, stables, food, wood and other supplies, carpentry and plumbing maintenance, etc. If something costs twenty-three silver pieces, it makes more sense to just give the seller the exact change he's owed, rather than messing around with change. Besides, the gold and platinum can be saved for the really expensive stuff.
In response to Set: How did the dwarves react when the party hauled in the huge altar to Moradin?