Very important issue being raised by Steve Rubel at MicroPersuasion - and also at the wonderfully named Lack of Motivation blog. I've wondered about this recently myself--why isn't Technorati (or anyone) searching blog comments? That seems ludicrous. It's like having a search feature on your message board that searches Topic headings -- but not the comments themselves.
First, Rubel: “Still, shockingly, every single blog search engine is missing out on
the next great opportunity. They’re focusing solely on searching blogs.
They’re building great tools for bloggers, but they’re failing to
recognize that what we all need is a way to search the entire conversation. This is where the blog search war will be fought in the months ahead.”
And Lack of Motivation writes, "In some blogosphere monitoring we do for various clients, comments are
a huge part of measuring the pulse or sentiment of those writing about
the company or product. Is it a tedious process milling through all of
the comments to find those two or three nice nuggets? You bet it is.
Are comments invaluable sources of feedback that "only extend the long
tail of conversations in the blogosphere? Hell yes they are.
The comments at the Lack of Motivation post on this subject are pretty good, too. Seems there are some technical reasons why this hasn't happened yet -- but I think it's got to be just a matter of time before someone figures it out. Comments aren't necessarily the stars of every blog, but they're a vital part of what makes most blogs tick. If we can't search them, we're not fully capitalizing on the medium.