Yes, they work on any individual Xbox 360 they are connected to. I have my friends old one and it works on mine just fine.
Yes, but stealing is illegal.
It depends on the type of wifi adapter. The 3 most common ones are b, g, and n. First check the type of adapter your laptop has. Mine, for example, is wireless n. If you have a wireless g adapter then upgrading to a wireless n adapter would be a good choice. Alternatively, upgrading you're router to wireless n (if you're laptop is wireless n) would work too.
no. you have to buy the xbox 360 wireless adapter. unless you mod the consle
Any wireless router can work on the Xbox 360 yes. A wireless plug in adapter can work.
I am not going to say it is impossible for a different adapter to work, just unlikely . The Xbox 360 Wireless Network Adapter was made specifically for that purpose, so it is unlikely that a normal adapter will work if attached to the Xbox as they most likely will not be compatible.
Yes, a wireless n adapter is backwards compatible with wireless g. Check the box you are buying and it will tell you if it is compatible with which wireless ranges.
Probably not. Most players are WiFi enabled with the wireless adapter built inside.
Some PS3 have wireless network adapter installed and only what you need is to connect to your existing wireless network. Instructions are here http://www.ehow.com/how_4812599_up-ps-via-wireless-router.html If you do not have a wireless adapter, than you are stuck. So far there are no adapters which would work with PS3.
You need drivers for the adapter. PS3 does not have. The only way to have wireless in you PS3 is integrated wireless.
as long as you have the right drivers
If its formated for the PS3 I would think so, BUT the PS3 already has a built in wirless adaptor
A USB wireless adapter will work just fine on a desktop. A PCMCIA (cardbus) wireless adapter may present problems as most desktops do not have PCMCIA slots. There are ways around this problem however, such as pcmcia-to-PCI adapter cards & the like.