I am also a psionics lover. My first character that I played for 3 years was a psion.
I would love to see psionics in pathfinder, but I hope that it loses some of the creepy Ghostbusters feel... ectoplasm and all that crap makes it seem so sci-fi.
Honestly I think just limiting it to traditional psychic abilities would be enough- telekinesis (including pyro), telepahty, astral projection, clairvoyance, seeing the future/past..
though i did play a shaper, i thought that the discord between the normal magic and psionics did damage the feel of the campaign some.
I am a huge proponent of spell points though. I believe the sorcerer should use spell points, and I think the psionics should keep that. But I think to keep the fantasy feel, they should be kept to more.. subtle powers? In this way I think psionics can exist as some mental mysticism without stepping on the mages bailiwick. No giant fireballs or direct damage spells, outside telekinetics, and I definitely liked that you had to pick a focus, like a specialist mage, but more focused.