Google's idea of making a special search engine for blogs is brilliant, but another product could be in trouble because of it.
Google Blog Search indexes only blogs, and since they have become a veritable news source, Google News is outdated by their update rate. The difference in quality between the news which are written and indexed by a blogger and those which are indexed by Google News is undeniable, but someone who is
interested in the latest news has more chances of finding them through Google Blog Search.
For example, searching after "Nintendo" returned on Google Blog Search 134,205 results, the latest link being 19 minutes old, while Google News returned only 3760 results, the latest news being 37 minutes old.
The same thing happened with other 20 keywords, each of them returning more results on Google Blog Search than on Google News. Only in 5 cases out of 20, Google News returned more recent results than Google Blog Search.
When Google Blog Search was launched, Google's officials said that they are not planning on combining the two services, but maybe it wouldn't be a bad idea, at least certain blogs which are updated by knowledgeable people could be included as news sources.
Currently, Google Blog Search is not indexing blogs older than March 16 2005, so the chances for old or irrelevant posts to be presented among the results are slim. In addition, Google Blog Search doesn't group the links according to the relevance of the keywords, the way Google News does.