Before our wedding we only received 2 wedding-related cards. Because I was planning to make this card album after the wedding, I was a little worried that I wouldn't have any cards to put in it! We didn't register anywhere, so I really didn't expect to get any gifts, and I couldn't request that people get us a greeting card just so I could put it in an album. :) Luckily, we got the perfect amount of cards on our wedding day, so the 'card album' is holding more than 2 cards.
The supplies I needed to buy for this card album project were minimal - the only things I didn't have in stock were the metal book ring, the 3D letters for the cover, and the brads to keep the ribbon attached to the book.
I would say the card album I made is a simplified version of original card album made by Something Turquoise. The only decoration I added on the cover besides the single color of paper is a few thick stickers that I glued on with E-6000 (the stickers didn't seem very sticky, so I glued them). I used a glue stick (instead of glue dots) to cover the tag board (originally the back of a pad of drawing paper) with scrapbooking paper.