Eric Osterweil gave an interesting talk at the NANOG44 DNSSEC BOF. His data (shown below) from SecSpider indicates a significant increase in signed zones right around the time that CERT VU #800113 was released:
(click for larger) The blue line shows a large increase in the number of signed zones automatically discovered by the SecSpider crawlers in August 2008. A message to the dnssec-deployment list confirms this as well.