Edmunds Insideline confirms:
"Now in its third year since the 2010 overhaul, the 4Runner only gets a few small changes for 2012.
Toyota upgraded the SR5 and Trail grade models with standard Sirius radio, Bluetooth and a USB port with iPod connectivity.
Limited models get Toyota's new Entune mobile technology interface as standard equipment with a JBL audio-navigation system an option. The Entune setup is optional on the SR5 and Trail models.
And last, and most certainly least, SR5 and Limited trim 4Runners will be available with power-retractable running boards."
The Trail already has Sirius, Bluetooth and USB port standard. So, no actual changes reported for it.
Power retractable running boards....hmmm....I'm not sure about that.