With the promise to "find blogs on your favorite topics" it should be a helpful tool for some folks since some sources claim there are more than 10-million blogs on the 'net.
I googled for my name and topics I have blogged about and some of the hits were indeed on my blog. Cool.
By the way, Yahoo! has apparently enabled it's news search engine to scan through the blogosphere for a while now so the Google search is not new. However, Yahoo! fell short in my searches of my own blog topics.