First look at R.A.B. note, new Slughorn pic
The Noble Collection's latest catalog includes an area for their Half-Blood Prince items, and it includes this picture of Regulus' note to the Dark Lord. To see everything the Noble Collection has to offer, click here.
On a related note, a new image from the German 2009 Half-Blood Prince calendar can be seen right here. It's a small image that depicts Slughorn and Harry in Potions class.
Thanks to Snitch Seeker and Laura for the tip!