All this info we've known for a while now:

-It's coming in fall of 2006
-It uses new processor and disc technology that Sony themselves spent the money and time to develop

And that's uhhh... about it.

Oh, and why would Sony be "tied down with the PSP" right now? It's basically out in Japan, and not much will have to change for the US launch... the PSP is a very small project compared to the PS3 which they've been working on for years now, and early development of games (for all next gen systems) started in many places such as EA, earlier this year. Most developers however will jump on projects for the "new" systems (remember, Nintendo's and Sony's are still almost 2 years away) when their initial information is unveiled at E3 in 5 months.