I just double checked the ISC2 website and according to the official CISSP Recertification Guidelines, Security Conferences count toward credits at 1CPE/hr
Conferences
CISSPs earn 1 CPE credit for each hour of attendance at a conference. Security conferences qualify as Group “A” CPEs. Other educational conferences qualify as Group “B” CPEs.
Since Mooner and I recorded the speakers we saw, there is the auditable proof of our attendance. Of course everyone can get CPE credits for watching the presentations once they are up online.