Yahoo announced they have been making changes to their crawling, indexing and ranking algorithms over the past few days. Guess we were all too busy discussing the impact of recent Google changes and buying and selling links etc.
If I am reading their blog numbering system - it was their 500th post. Way to go Yahoo!
What I liked about this announcement is they called for input - the post has link to a form to submit problems or feedback - guess Google does it by reading all the blog and forum noise.
Yahoo wins this round - they avoided the "slap" effect Google's changes have caused, while still changing their algorithms.