I've been hearing rumors about this for quite a while. Google has launched a blogsearch service. While it's still in beta (I haven't seen anything about it on Google's main page, I've taken it on a couple of trial runs. So far it seems to work really well, which is about what you'd expect out of Google searching anything. For example, searching St. Mary's Wilderness brings up my relevant posts pretty quickly.
It seems that the search uses a site's RSS feeds to index it. This means that search information will be even more timely for the blogsearch, which seems like a nifty trick.
NP: "Gridlock" - The Pogues