Today only, PlumDistrict offers a 20-Page 8x8" Hardcover Photo Book Credit from Shutterfly for $10. Coupon code "funfun" cuts it to $9. The voucher doesn't cover shipping, which costs $7.99. At $21 off, that's one of the best such deals we've seen for Shutterfly, although we saw a $30 credit for free in March (which included transferring photos from PhotoWorks). Note that this credit is valid for new Shutterfly accounts only. Voucher expires September 7.