I was brought in due to a keen interest in fanatasy and I found some old 1st ed D&D books floating around in the early 90's and I also played the Eye of the Beholder game on the Amiga.
A few months ago one of my players borrowed my 3.0 core books. I was not using them and had not used them since 2003. Anyway I found out on Sunday he has been running games for his sister and her friends want to start playing. He asked how many is to many as apparently she had 9 friends wanting to play and had figured out things like hold person targeting will saves.
I told him 9 people is to many and you probably want to cut that down to 5 or 6 at the most. Looks like my old 3.0 books bought over 12 years ago may be bringing in some new blood, my 1st D&D books were of similar age as well.