In the book Lords of Madness there is a feat called Mindsight which basically allows you to pinpoint the location of (like blindsense), and the Int and type of, any intelligent creature within the extent of your telepathy.

So if something has Telepathy 100ft., it can sense the Int, Type, and location of any creature within it.

My question for you knowledgeable persons is: does the identification point out particular individuals, like Scent does? In which case, could a person remember the mental signature of someone and be able to identify them later should they appear?

Or does it show up like a blip on a radar with no ID'ing signature? Meaning that they could not tell two Int 12 Humanoids apart, even if they know one is a friend named Bobby?