The Grand Inga Project is now available. I can’t say I intend to buy it, but the trailers and snippets are worth watching.
And the article in Kayak Session is worth reading (for free, right now). Very impressive photography.
Most of the world’s big “unexplored” places are isolated by both harsh conditions and distance, which makes it intriguing that the world’s biggest (1,500,000 cfs!) rapids are close to one of the world’s largest cities. A good reminder that vision, rather than any external factors, is the largest limitation on adventure.