Y!Q is Yahoo's latest search tool, serving up search results related to whatever context you're in. For Mac users, Y!Q can be added to your Firefox browser. You can also embed Y!Q tags into web pages so users can view related results overlaid on top of your webpages, without leaving. I'm too tired to play with it much tonight, but I can certainly understand the motivation for inline search tools. I'll have to try it out
Now that Microsoft, Amazon, and Yahoo are chasing madly after Google, search innovation seems to have accelerated. That's a great thing for users.