If you're looking for pitchable deep expertise in the IT infrastructure space, you can still find it in Packet Pushers, a team of podcasting publishers who celebrate their tenth anniversary this May. Freshly posted on their site is the 500th episode of the Heavy Networking podcast.
If you've got deep-tech B2B IT clients who loathe giving interviews to non-technical reporters, you'll love Packet Pushers. Maybe you already do. Based in England and New Hampshire, Packet Pushers describes itself as "a community of IT practitioners & vendors who write, podcast, and help each other as industry professionals."