Continuing my trend of providing free advertising to people who make science cool and accessible: Made With Molecules. ThinkGeek already did the t-shirt thing with their caffeine molecules, but the jewellery is very lovely, especially the earrings and simple necklaces (I loathe charm bracelets). Putting on my once-was-jewellery-designer hat, I'm all for putting a premium on design work and charging people accordingly, but I think the prices are just out of reach for those (grad students/postdocs) who might want this sort of thing the most. I mean, I know precious metal prices have risen ridiculously in the last 2 years, but I wouldn't stretch to $85 for a simple silver necklace.
I know, what a killjoy, right?