A few days ago the EVO 3D on Sprint received an update described as a "security update." At the time, it was unclear exactly what the update really brought to the table, but now the answer is pretty clear: it removed Carrier IQ. This comes after a whirlwind of controversy surrounding the software, which was initially uncovered by Android developer Trevor Eckhart.
After an uproar from the Android community, most providers and manufacturers stepped up to the plate and said that they would be removing Carrier IQ from their devices, and it looks like Sprint is the first one to start making good on said promise. While the EVO 3D is the first device to get the Carrier IQ-removal treatment, it certainly won't be the last - in a statement to The Verge, HTC has confirmed that it is working with Sprint to remove Carrier IQ from all of its (current) devices:
HTC can confirm that we're working with Sprint to provide maintenance releases that will remove Carrier IQ and provide security enhancements and bug fixes beginning in January.
Naturally, other manufacturers will follow suite, though no timeline has been given as to when non-HTC devices (or devices on other carriers) can expect to see updates.
It's nice to see Sprint react so quickly to this sensitive situation - hopefully other providers will take note and do the same.