blogsearch

Google's blog search feature raises an interesting question from the user perspective. I'm sure there's a wonderful technical explanation for this, but still, as a user, you have to wonder about this:

How does Blog Search work?

Blog Search indexes blogs by their site feeds, which will be checked frequently for new content. This means that Blog Search results for a given blog will update with new content much faster than standard web searches. Also, because of the structured data within site feeds, it is possible to find precise posts and date ranges with much greater accuracy.

My question - why can't the blog search results be incorporated into "standard web searches"? To be more specific, why can't Google's regular search results incorporate the blog search results? While you're asking about combining results from several search engine companies, here's a case in which a single company (Google) can't combine its OWN results.