Thought I would share these articles about online images and copyright- http://www.socialmediaexaminer.com/copyright-fair-use-and-how-it-works-for-online-images/ and
http://www.savingforsomeday.com/blog-law-photo-use-and-etiquette/ (has a series called Blog Law that might be worth reading).
I know I’ve seen blogs around the blogosphere that used pictures from news sources (like the AP) and wondered what rights as a blogger we have in using them. I thought this article did a good job going through the copyright information for images (good info in the comments in the first article).
I use my own photos, photos with Creative Commons from Flickr (found through Wylio), images from stock.xchng and occasionally paid images through iStockphoto.
What sources do you use for images?