I've switched to Picasa officially. The new Yahoo Photos is possibly worse than the old one which I thought was absolutely impossible. I gave Flickr a brief try but, having been purchased by Yahoo, it now sucks too. The Yahoo Mail is still in beta but it's so slow at times I'm also thinking of permanently switching to Google Mail (GMail).
Now I have my blog with Google (you're reading it, Blogger is owned by Google) and my home page and search are all Google. Yahoo... better watch your back. When IT guys abandon you it's all over.