Two new things are happening with Yahoo! today. First of all the newly re-designed AJAXy homepage which Yahoo! gave users a peak at a couple of months ago went live (as did most the international versions of it). I think it's stunning how much work that's been put into it. Richard MacManus broke the story with some interest analysis and as he points out, this is a big turning point in the whole Web 2.0 trend: where the mainstream really get their first feel of it.
Couple of things you might notice is that Yahoo!'s completely stripped off their web directory from the homepage: something which they originally started off as and that was there for almost 10 years. This to me is a great analogy of Web 2.0 and how it's changed the web, and Yahoo!'s move is only the peak of it.
Secondly, CNET reports Yahoo! Finance is getting a facelift. Among the new 'finance' are some interactive new stock charts, a new Flash-based stock widget they call 'Badges' for bloggers and website-owners alike, an improved message board system and some business-related videos from content partners.
They currently own approximately 35% of the traffic in this market, and I think it's great to see them take this further. For me, I personally prefer Google Finance just because it has the 'Google' feel to it and some neat AJAX, although I'm sure if I start to use Yahoo! it'll grow on me.