If you’re interested in adding images to your WordPress posts, you could do worse than the Image Inject plugin.
First, yes a plugin that injects things into your WordPress install does sound a bit scary. But, putting the name aside, what it does is add a search box to your post editor screen. Simply enter your search term, and it will show you results from Flickr and Pixelbaby with a license that allows you to add them to posts. It even includes the photo credit and link, along with the creative common license.
Above, you can see the results of a search for WordPress. I spotted that photo and selected the size I wanted, and the plugin added it to my post. An easy way to add visuals to your blog posts!