This tool is an experiment with Location metadata and Google maps. It is in no way endorsed or supported by Google or any other organisation – this is just an experiment by us folks here at Blogwise, so complain to us if it breaks
BlogWise currently maintains locality information of blogs anyway and is quite popular. So BlogMaps is a nice logical extension. Unfortunately its still in Beta – and lists a very small number of blogs. However its a feature to watch out for as it evolves, considering the popularity of local blog aggregators (subway system based) like NYC, London Bloggers and many more.