I too have had my quilts pinned from here and I also considered it a huge compliment that someone cared enough about my work to pin it.
I also recently set up my own pinterest account but I think I only know enough about pinning to be dangerous. Most of my repins are from other pins. I have yet to figure out how to pin from the web! So I set up two boards. One of my own stuff and one of other peoples stuff. I really don't have a clue if my repins are referencing the original source or not.