I'll do a longer bit on this later in the day when the "official" version of this makes itself known online. For now, AICN has a decent-quality bootleg of the first trailer for "Indiana Jones and The Kingdom of The Crystal Skull" up here: http://www.aintitcool.com/node/35616
Here's why I'm too amped-up to wait for the full-quality thing to point it out: Take a look at the clip at about (theres no timestamp on the video) 1 minute 22 seconds in, which appears to show Cate Blanchete's character inspecting a metallic box that's magnetized for some reason. Take a look at what's written on it.
That's all I've got for now.