This is a bit of an 'inside baseball' post, but...
Online feed readers, such as Bloglines, Google Reader, etc. allow many people to subscribe to a single feed without actually querying the feed for each user. This means that tools such as FeedBurner are unable to track the number of subscribers accurately unless the tools report the number of readers. Bloglines has done this for a while, but today Google announced that they are now reporting the number as well. Finally.
Feedburner says the number will be incorporated into their reports tonight, so tomorrow my number should double... to 2. :)
Google is a little late the the party here, but I'm glad they finally showed up.