In response to Amanda Reig's request on Facebook, I'm starting a discussion forum where we can share periodic table files in a variety of formats. I have included two Word versions in portrait and landscape mode as well as an Excel file. These files can get manipulated to fit on a credit card.
Here's a fun question, prompted by this blog posting:
How many of the chemical elements have you worked with in your research and teaching, either in elemental form or in a chemical compound?