Satoshi (good luck!)
Plato
Any core dev
Anyone behind one of the major auction sites or exchange sites
Mobile devs
Lawyers to talk about the stupid legal stuff
Anyone making or funding national advertising
People who might be adversarial to bitcoin (interesting debate of any sort)
Brick and mortar merchants
Anyone from sympathetic groups/orgs
Wikileaks!!!
Any politician/economist who is willing to be honest about current monetary policy