The calendar that looks like a calendar but reads like a post card --- the 2008 happify calendar! This set of 12 note cards can be posted on your cube wall or sent out with a note to friends. Vomit enducing idea! Send your significant other a note card every month with the reasons why you love him or her...I can feel the chunks rising already. $12.00 at Happify.
Of course, if you are tired of running out to purchase a calendar every year, you could always pick up this perpetual wooden block calendar from Queenvanna Creations. There are three month blocks and two date blocks, plus the wooden base.