Here's a nice little feature for those of us who love to post images on the internet. Bing has added the ability to refine image results by license. The addition's simple enough to use -- just do a search and pull the appropriate license from a drop down on the top of the results page, alongside options for date, size and color. Selections include public domain and options like "free to modify, share and use," based on the Creative Commons licensing system, so there's no doubt as to precisely how you can incorporate them into your own posts. Google's had a similar option on its own search engine for some time -- albeit one's that's a bit less prominently displayed.