We already knew that Sprint was killing off unlimited data for the hotspot plan, but today's news makes everything all official. Starting in November, users with a mobile broadband plan (that would be a tablet, netbook, USB card, connection card or mobile hotspot device) as well as folks using the mobile hotspot plan on their smartphone will no longer have unlimited data. Depending on your existing plan, you'll be placed in a tier that goes between 3GB and 10GB of data, with a $0.05 per MB overage in-network, and a $0.25 per MB overage while roaming.
Note that this does not affect unlimited data for smartphones. Your Epic 4G Touch or EVO 3D will still have unlimited data. It's still a direction we hate to see yet another carrier travel, though. Resist the temptation Dan. Don't kill your unlimited smartphone plans.
Source: Sprint. Thanks everyone who sent this in!