I heard two more great rumours today...
1: we WILL get dual shock with the PS3 joypad after all, but using a wristband so that it wont cause any problems with the motion sensitive controller
2: there is announcement on the way about the PS3 controller being able to work with a 'wand' interface, just like the Wii. Bad news is that you will have to buy it as an extra.
The same guy told me about the existence of a pink PS2 !!! I wouldn't have mentioned the above, until Sony announced the pink console today... so who knows !