Shortly after the console I imagine.
About 8 controllers
YES.
no
No, you can't use ps2 controllers to play ps3.
2 controllers can fit in the playstation2
Yes they do. It works the same with PlayStation games on PlayStation 2 consoles.
Yes they are
It enables up to four controllers to be plugged in to the PlayStation 2 simultaneously.
The Playstation 2 console has two slots for plugging in controllers however an accessory controller multi tap hub allows connection of four.
Setup>Controllers>Callibration
You can connect up to 7 controllers. And if people want to use the PlayStation Move while playing, (using 2 controllers) you can have 3 people using it, and have 1 person using the original controller, or 2 people using PlayStation Move and 2 people using original controllers, and etc.
The most popular Playstation 2 accessories available for one to purchase are Playstation controllers, Playstation games, and Playstation controller chargers.