There've been a number of posts recently on the crystal skulls which inspired the latest Indy movie, and one of my perennially fave blogs Boing Boing's done quite a few (like here and here!) As you can see in the sidebar at the left, though, another post's been added to the blogosphere... Mine!
I hoped to add a bit more science to the mix with my Metafilter post, Indiana Jones & the Quest for the Truth behind the Crystal Skulls. I hope you enjoy it!