I have found several antispam vendors that feature realtime statistics about the percentage of spam received, the size, number or location of botnets, etc. The big numbers are important, interesting and useful, but sometimes details are also very interesting.
SpamCop, affiliated to Ironport, provides real time statistics about the sources of spam and the URLs that are marketed by it. It is very funny to reload the page and see the last 10-30 minutes spam sources (addresses and IPs), and advertised Web sites. In the second case, you can also track back the IP address of the web site.
Worth a while!