Two regulatory activites are currently underway which are related to this.
There's an Industry-FAA Stall/Stick Pusher Working Group which is looking at both training norms and at simulation capabilities. That's supposed to wrap up this month, IIRC. Recent FAA movement on the applicability of the Practical Test Standard "minimizing altitude loss" comes at least in part from this activity.
There's also an Aviation Rulemaking Advisory Committee task assigned to the Avionics Systems Harmonization Working Group to:
provid[e] information that will be used to develop standards and guidance material for low speed alerting systems. This information may result in
standards that complement existing stall warning requirements.
They are wrapping up for rules for all-new aircraft (phase 1), the next phase will be to consider retroactive requirements for existing aircraft.
(ARAC tasking notice published in the Federal Register on April 2, 2010 (75 FR 16902).)