Also, I'm pretty darn sure I saw one on the seven seas lagoon a few weeks ago. If it wasn't one of them then it was definitely a boat with a very similar design.
I'm still hopeful they'll bring it back one day. What they could do is add some docks around the River and reconfigure the system so that they take you from one dock to another, acting as an around-the-park transportation system like the WDW Railroad. Then they can declare the boats as a transportation system and not a ride, like they do with the World Showcase Lagoon boats at Epcot, and nobody can be disappointed by the lack of show-scenes.
I'm still hopeful they'll bring it back one day.
Register on WDWMAGIC. This sidebar will go away, and you'll see fewer ads.