Originally Posted by keg in kc
That guy is Grand Maester Pycelle. He's the highest Maester in the kingdoms, although they haven't really gone into any detail yet what Maesters are (the only other one I think we've seen so far was Maester Luwin in Winterfell). Think, ah, something along the lines of scholar, advisor.
After re-reading it, I think the old guy he mentioned is Barristan Selmy, not Pycelle. When they were talking while Robert was drunk and called in Jaime telling war stories. There wasn't much to what he said, just talking about who he killed first in his life.