Google announced that they will accept pings to their blogsearch service. Hopefully Pingomatic will support it soon so you don’t need to update your “Update Services” in WordPress. I’d say Matt’s sleeping off the jet lag from his trip to Vienna but it’ll probably be there in a few hours!
If you can’t wait, add “http://blogsearch.google.com/ping/RPC2” to the “Update Services” in your WordPress Dashboard under Options->Writing.
Why is this good? By pinging Google you can tell them that you have updated your blog. That will get your post into the Google Blog Search index that much faster.