This is why Yahoo!’s announcement is so big. Now there are machines reading that data and using it and enriching the web with it, do you, as a developer or site owner, want to miss out on that? Yahoo!’s search is to use microformats initially, to improve their understanding of the data to return more relevant results (and, from the looks of their example with LinkedIn add more detail to their search results). So, will other search engines, I’m looking at Google and Microsoft here, want to miss out on the wealth of data that they aren’t collecting and Yahoo! is?