Blog stats are of interest to blog writers because we sometimes like to know that people actually read our blogs! But by and large the blog aggregators like Amatomu and Technorati give suspicious looking results. My own blog visitor counters at sitemeter and blogger give wildly different numbers as does google analytics.
A few weeks ago I found these useful tips:
Google Reader: - you can find how many people are subscribed to a blog by adding the blog to your subscriptions (I didn't previously subscribe to my own blog!). You click on that blog and then choose 'Feed Settings' from the menu and 'View details and statistics' from the submenu. Hey Presto - number of subscribers. No names though!
Google Page Rank - this is a Google Ranking which is a number out of 10. You can find it for any page at http://www.prchecker.info/check_page_rank.php and other places. (You can find how this rank is determined at wikipedia.) Google only updates the publicly available figures every few months.
Open Site Explorer www.opensiteexplorer.org/ allows you to enter a web page and it will show all pages linking to that web page. This is a limited option thing, so it will encourage you to pay for the service after a while.