Writing a good blog post is more than just putting words on paper. It's also about rounding out ideas, opinions and thoughts with content that supports your statements -- be it maps, pictures or links. And sometimes, the hassle of digging up that supporting content is the most painful part. So, to help bloggers address these pain points, we built Yahoo! Shortcuts for Wordpress -- a technology that sits in the background and finds and offers content to help build out your post in real-time. Shortcuts lift the burden of finding additional content and integrating it into your posts so that you can focus on the meat -- the writing.
It's released under a BSD license. <edit> whoops - also has additional terms for some components.</edit>
I think the relevant part is where certain types of commercial activity are excluded (selling Nazi propaganda, cracking codes, etc). It looks like your porn blog is out of luck (unless it's just for your personal use, of course).