Many blogs on the web display the number of RSS subscribers they have via a little FeedBurner chicklet that looks something like this:

It’s plain and simple HTML:

<img src="http://feeds2.feedburner.com/~fc/FEEDNAME?bg=2856e9
&amp;fg=FFFFFF&amp;anim=0" height="26" width="88" style="border:0" alt="" />

Since it doesn’t require authentication, this is also an easy way to look up how many subscribers a blog has if you know the name of the feed. Simply replace the “FEEDNAME” part of the URL with the name of the feed you want to look up. For example, if I replace it with “TechCrunch”, I get the following image:

Voila! An easy way to look up the number of subscribers of a blog that utilizes FeedBurner.