Today and tomorrow, for Cyber Monday, free shipping in my Etsy shop (http://jbarnum.etsy.com) with the code MONDAY2011.
Also, check out Lulu’s front page. There is currently a 25% off coupon code for calendar orders! I believe they’re also announcing another big discount tomorrow for Cyber Monday. You could use it to order some of my science calendars, or anything else you want from Lulu.