Topics that I think would be interesting:CML - Cisco Model Lab (and VIRL). Simulating networks for testing, design, and certification study.Firepower services (IPS/AMP/URL Filtering).IPv6

I would like to see something on ASA firewalls.  There's been a lot of movement there with BYOD, the new ASA 5500X line, IPS/IDS as software, v9.0 and v9.1 software... why should someone upgrade from an ASA 5520 running v8.2 or v8.3 to v8.6 or newer ...