Not into the PlayStation 3 itself, but pretty much all TVs or sound systems would provide a jack for earphones to be plugged in.
PS3 games play only on the Playstation Network when the PS3 is connected to the internet
If you have internet service and the WiFi modem or router
No the PS3 is designed to be connected to a television. It will play on any form of television it can be connected to to from 480i to 1080P
While they can be connected they are always making you play with a handicap because they are not as good as the Dualshock 3 so why would you want to
No the PS3 when it is connected to the Playstation Network
As the PlayStation 3 cannot generate a DHCP server, they cannot be connected directly together. However, both can be connected to a router and work as part of a LAN that way. Some games for the PlayStation 3 support LAN play.
no the PS3 does not run windows and you would need a keyboard for the PS3
A PS3 can be connected to a Projector HDTV or any TV that has the inputs.
While Playstation Home is still in beta format it is available for PS3s connected to the Playstation Network
The PlayStation Move was designed to be connected to a PS3. If your PlayStation is connected to the internet than it has all the latest software updates and can operate the PlayStation Move Controller and Eye Camera included in the Move Bundle. Without the latest updates it does not contain the software to operate the Move, but it is easy to connect to the internet at a friend's house or pay for when you purchase the Move Bundle from best buy
Yes you must have an internet service or WiFi connection and it can also be connected with an ethernet cable
Yes. You can play online as long as you are connected to the internet and have a PSN account.