I thought I'd share a cool link I found recently through an indie forum...
A company called MOO prints cute mini cards you can use as promos, business or calling cards, as well as small sticker books, postcards etc.
They have a cool option where you can have up to 100 different cropped images for 100 long and lean mini cards so you have a variety of images and on the back you get several lines of text. These cost about $20 for 100 mini cards.
I am thinking of ordering some thank you or coupon cards myself...You could even use these for clothing and handbag tags.
Visit http://www.moo.com/ for more details and have fun uploading and cropping images :)
p.s. might get stuck while uploading many images, I suggest you disconnect and try loading again!