NY2011
From an email:
Advanced Notice: Boxing Day Sale + 20% off Coupon
Our clearance sale is now live and includes thousands of posters and prints on sale and up to 70% off list price. Plus you can save an extra 20% off everything online from 26 December to 10 January 2011.
Use coupon NY2011 at checkout, cannot be combined with any other coupon.
They've got some nice looking stuff and their framing is fairly reasonably priced too, you can see it online before you order it and play around with how it looks.