Sprint has posted that the HTC EVO 3D version 2.17.651.5 update should start rolling out today. It's a minor maintenance release that addresses the following:
Updated Peep client (to align with Twitter)
Battery life improvements
The OTA should start rolling out to devices today, but you can manually force the update check by tapping Menu > Settings > System updates > HTC software update > Check now from your homescreen. If you get this one, be sure to talk about it in the forums so others know what to expect!