@Tommy's: You don't need to sub to collect stamps.
1. Go to yoursubdomain.deviantart.com
2. Click the "Faves" tab between "Prints" and "Journal"
3. Click the "New Collection" button and name it "Stamp Collection"
4. Go to http://calaval.deviantart.com/gallery/ (or search "guild wars stamp" for other artists too)
5. Click a stamp you like and hold the mouse button down for a second.
6. A bar will appear at the top of your screen with a "Stamp Collection" box.
7. Drag the stamp into the "Stamp Collection" box.