My mental clock is on a 36-48 hour cycle, so it's still Post GIS day for me. Well it's always Post GIS day technically except when it's GIS day. To celebrate the new year, I've updated the Flash cards.
You can find them PostGIS Day 2012 Flash / Playing Cards. HINT: The functions with superscript 1 or 2 are new or changed in upcoming 2.1 release and there seem to be a lot of 1s and 2s around the raster functions.