Google announced and released a number of innovations to their core search product this week, including search options and support for microformats/RDFa. What I think is most interesting about this is not so much the specifics of what they have done, but that they continue to innovate in core search. This contrasts with several other big names on the Internet, such as eBay, which for years have not really improved their core offering. One thing this suggests is that Google has in fact built a...