So, after put it together, based on this preview:
Dave/Cherie: no further sightings
Art/JJ: last seen in Argentina, with that animal thing
Elliot/Andrew: last seen in Paraguay pitstop
Kerri/Stacy: last seen in graffiti thing, Italy
Bopper/Mark: 100% made it to Azerbaijan (*9000 taxi)
Nary/Jamie: beekeeping roadblock in (likely) Tanzania
Vanessa/Ralph: last seen in street alley in India
Dave/Rachel: 100% made it to Osaka, Japan
Brendon/Rachel: made it to Hawaii (Rachel's voice from helicopter and repelling thing too)
Joey "Fitness"/Danny: repelling down in multilevel car park?
(Japan??), and Jamie did it too