There is now a big Pluckers sign on the old Black Eye Pea... As of last weekend... Not sure what they've done to the inside, but it does look like they intend to open there at some point...
As for the old KFC at Barton Springs and Lamar, there was a sign on that last week saying that it was going to be the triathlon/bike shop that is currently on Barton Springs right before Zilker. I can't remember the name, but it's right across from Chuy's and hasn't been there all that long.