Re: whatever happened to these characters?
We did see Dr. Pulaski pop up on Terok Nor during the Cardassian occupation in Double Helix: Vectors, and according to Memory Beta, she's at Riker and Troi's wedding in A Time for War, A Time for Peace.
IIRC, she was featured as CMO of the U.S.S. Repulse
in Peter David's TNG: Vendetta
This dream must end, this world must know:
We all depend on the beast below.