Not exactly thrift-shopping (but I do use thrifting finds like magazines and vintage books in my work, so it kind of is), but my friend at the (did I mention fantastic) Scrapatorium blog turned me onto the Collage Kids group at Flickr.com. Of course I joined and have posted some of my images. Flickr also allows you to create a collection of images for yourself which you can view here.
Enjoy...
Enjoy...