When Google first announced its blog search engine, they made it clear you would need to go through avenues like Technorati to get your blog listed.
That’s changing, as Google has announced they will be allowing direct pings to their blog search engine:
Blogging providers who syndicate RSS/Atom/XML and want to be included in our Blog Search index can now ping us directly.
If you believe your blog isn’t already listed in the search engine, you can submit it manually. Then, go ahead and update your ping services list. (Ping-o-matic should be supporting them soon enough, but if you’ve had trouble with Ping-o-matic in the past or prefer to monitor your list, then make sure to add Google’s blog search engine.)