You may still be working on your giant tape ball or extra-long fingernails, but here’s another opportunity to make world record history. Social media company CaringBridge is inviting people down to MOA to sign the world’s largest greeting card for its 15th anniversary. The card stands an impressive 30′ tall and needs as many signatures as it can get to break the record. Since CaringBridge is a company dedicated to helping people coordinate care-giving through social media, the messages will tend toward hopeful and inspiring. There will be music, celebrities, and excellent penmanship. Not bad for a Thursday morning.