Polaroids remind me of 1st grade in Ms. Gianpiccolo's class (I can't believe I still remember the name!). In the beginning of the school year, she took a Polaroid of each student, so that way at the end of the year, you can see how much you've grown. I still have that Polaroid, the colors are so ingenious and dreamy. I was wearing a white top with a huge red sequined heart and I had a high ponytail. I want to scan it one day. Anyways, here are some sources for great Polaroids and some of my fave Polaroids too.
Sources for more Polaroids:
The Polaroids community on LiveJournal
We Heart It, a site where people post their favorite images across the web.
Polanoid is a collection of various Polaroids.