To get a good handle on my subscriber base, I thought I will replace the RSS/Atom autodiscovery links in my blog with Feedburner link. You could also use this instruction if you would like to make your Feedburner feed as the only auto-discoverable feed. In Beta template, the autodiscovery links hide behind the line (even if you expand widget template).
<b:include data='blog' name='all-head-content'/>
I found it's expansion by viewing page source and replaced these RSS/Atom links
<link rel="alternate" type="application/atom+xml" title="Hackosphere - Atom"
<link rel="alternate" type="application/rss+xml" title="Hackosphere - RSS"
with this feedburner link.
<link rel="alternate" type="application/rss+xml" title="RSS"
With this change, Firefox auto-discovered this feed from my blog. But Bloglines still finds only the old atom.xml and rss.xml (maybe from cache). So, if you had given my blog URL in bloglines and subscribed to one of these old feeds, please use the "Subscribe to bloglines" button in my sidebar and subscribe to the Feedburner feed instead.
Ok, enough of subscriber tracking, I guess. I will be back with a good hack soon.