I found this post with that has collected quite a few rumours surrounding the PlayStation 3 doing rounds in the past several weeks.
Some of the rumours were:
a) The PS 3 will be shipped with a huge HD to store photos, music and TV shows
b) The PS 3 will have too many features, hence, will be complicated to use
c) PS 3 will have online service to Korea
d) Activision said that it will have not one but 3 titles at the launch of PS 3
e) Won't have any supplies issue like chips manufacturers are ready with all the quantities.
Thanks: PS 3 News