In Alpha Release 2 Sense Motive is again a seperate skill from Bluff (thanks again, Jason!) but does not yet have it's own listing in the text.
In prep for it's inclusion I would like to start a debate about some possible uses for it besides the classic use of piercing lies (by all means, that use should remain).
In our game we use it also for noticing suspicious behavior and picking up on people's more subtle emotions and motivations.
Suggestions?
I would leave it as-is, and just fold it into Perception.
I think it and Gather Information (and the Urban Tracking feat) should become one skill, Insight. Tracking down information seems more of a function of Wisdom to me, Diplomacy could be used when trying to convince a specific NPC to give you information.