Feedospheric Stats

I'm at the Podcast and Portable Media Expo, where I ran into my friend Rick Klau with Feedburner.  Rick just rattled off these amazing stats:

• Feedburner is receiving some 250 million requests per day on the feeds for the approximately 400,000 feeds it is managing.
• The number of feeds managed is growing by 20-30% per month.
• The most popular feed they host gets over 4 million hits per day.