This morning I was doing some searching on Yahoo! on Web 2.0 for a project I'm working on, and I noticed something a bit odd. In Yahoo's SERP for "web 2.0" there was Stumble Upon icons and ratings. I have the stumble upon bar installed for Firefox (although I don't have it activated), and it doesn't appear when I use Internet Explorer, so I'm going to take a guess that this is just Yahoo! working with both Firefox and Stumble Upon to incorporate these features.
I also noticed the Yahoo! Answers being incorporated in a little different way with "shared by Yahoos" at the top of the section. Now, here's another "naming" issues Yahoo has, the term "yahoos" is a little derogative, at least around where I live. Perhaps they can come up with a better name, I know "yahooligans" is more for their kids section, but that's much better than "yahoos".
Regardless of the naming issues, I like the way they are incorporating this. Using the Answers Users' Avatars is adding that personal touch, and it attracts more users to Answers. It's the whole "name in lights" addiction, and Yahoo! works with that perfectly.
All of this is definitely an interesting turn for Yahoo! It really looks like Yahoo! is embracing the Web 2.0 features and services, especially in light of its recent purchase of MyBlogLog. This also means that we as Search and Internet Marketers have to be even more aware of social media.
I did a little more checking around other blogs and Igor Mordkovich also discovered the stumble upon display too, check out his take on what Yahoo!'s/Firefox/StumbleUpon doing.
I could be behind on noticing this, but if I am, I thought it was important enough to point out (again).