I love FeedBurner for tracking subscriber stats. I don’t like the limited views for my stats in their dashboard (the last 1, 7 or 30 days or all time). Blog Perfume has released a free tool for charting your FeedBurner stats that offers a few more time period options.
To use it you’ll need to enable the Awareness API for your feed. If you use the Feed Count badge on your site, then Awareness is already enabled.
Keep in mind that enabling Awareness opens up your stats to be used by developers in a tools such as this chart of Top 100 podcasts from Podfeed.net. If you don’t want to leave your feed stats open to developer scrutiny, you can temporarily enable Awareness, use the Blog Perfume tool and then disable Awareness again.