IMO, more is actually known about the Revolution than the PS3... or at least they're very close...

But I think the reason no one knows about Rev is cause Nintendo wasn't such a popular console this last gen, thus not many are looking for info on their next console... On the other hand, Sony is just a big name in consoles at the moment, so they just kind of overshadow Rev.

But dont worry, there will be enough info out on Revolution soon enough... you can bet people will be talking about it more then.