I learned of UpNext when it partnered with Verizon to offer what it called UpNext HD 3D maps last October. Like the folks at Droid Life, I had a tough time finding how UpNext's stuff was significantly different/better than other mapping apps. I guess one distinguisher for Amazon is that the company is not Google!
GigaOm, which broke the news, suggests the play is ultimately to populate its (not yet map friendly) Kindles with map data and services. This'd be the first "return to maps" for Amazon since the good old A9 days.
- GigaOm via @cageyjames