You need a wireless network adapter.USB devices are the easiest to install and they won't take up one of your expansion slots.
For a PC, hook it up via USB to a PC that is connected to said wireless network. Make sure it is connected, and then enable printer sharing in Network Connections. That's pretty much it for PC.
Make sure that your PS3 supports type of the wireless network you are using including security if you have one.
If you have a wireless adapters, most PCs do not have them, it means that your PC is wireless compatible. Even if you do not have it. It's very easy to fix. You can for $30-50 a good G-card which will allow you to connect to wireless networks (even to N-network, if the the network was configured to work in compatible mode).
You will need a wireless router and a wireless adapter to have wireless pc to pc connection
Wireless Networking and a WIFI
You go wifi hunting
Wireless keyview, as I understand, is a freeware programme/simple tool that recovers all wireless network keys (WEP/WPA) stored in your computer by the 'Wireless Zero Configuration' service of Windows XP. If your Wireless network has not been registered on that particular PC, then no key is stored. You can't just add a wireless network to the programme. Whichever PC you've had connected to the wireless modem/router will be the one that has the network passkey stored on it. I suggest you install the programme on that PC and run it (as an administrator). It should then "add" the wireless network and reveal the forgotten passkey.
Either on a wireless network or ethernet. Just plug your ethernet cord from your xbox to your computer. or on a wireless network choose the computer you wish.
Apple's Airport and Airport extreme are standard Wi-Fi network interfaces. You will need a Wi-Fi network card on a PC to connect to them. A standard Ethernet network card connects with Ethernet cabling and does not work with Wi-Fi.
To connect to a wireless network. This is an alternative to a corded connection via Ethernet or USB.
Routers do not require presence of other computers to work. You can have even a single router in your network with no computers connected and will still work.
To print an iWork document from the iPad you could either connect to a wireless printer, or any printer accessible from your wireless network, or export your document as a PDF file and print that from a Windows PC.