Listmania!
A Basic Wireless network Home Network
Wireless-G Broadband Router with SpeedBooster 802.11gWireless-G Broadband Router with SpeedBooster 802.11g
Buy used from: £31.98
the 'hub of the network'. connects all computers to internet, and allows computers to talk to one another --- install DD-WRT to make it better!
HP LaserJet M1120n Multifunction/All in One:  Scan, Print, and Copy Network PrinterHP LaserJet M1120n Multifunction/All in One: Scan, Print, and Copy Network Printer
Buy new: £161.58 / Used from: £150.00
One printer for all of your laptops, notebooks and PC's to use over the network... VERY EASY TO SETUP AND THEN USE!
BUFFALO - LinkStation Live HS-DH1000GL 1Tb Network Attached Storage (NAS)BUFFALO - LinkStation Live HS-DH1000GL 1Tb Network Attached Storage (NAS)
This has loads of space (smaller ones can be bought!) for all of your pictures, files and movies that u need to access from all devices (inc PS3, Xbox360, etc)
Samsung NC10 10.2-inch Netbook (Intel Atom N270 1.6GHz, 1GB RAM, 160GB HDD, Windows XP Home, Black)Samsung NC10 10.2-inch Netbook (Intel Atom N270 1.6GHz, 1GB RAM, 160GB HDD, Windows XP Home, Black)
Buy new: £299.00 / Used from: £239.99
Arguably the best Netbook atm, use this very small laptop with amazing battery length anywhere in the house. It has the power to do most things inc basic picture editing.
5 Port Gigabit LAN Ethernet Hub Switch 10/100/10005 Port Gigabit LAN Ethernet Hub Switch 10/100/1000
Buy new: £32.49
if you have a single LAN wire from the router, to which you need to connect two or more devices plug this in (acts as a splitter)
Belkin Wireless G Access Point F5D7130 - Radio access point - 802.11b/gBelkin Wireless G Access Point F5D7130 - Radio access point - 802.11b/g
If you need to extend the wireless range of your network (if you have a big house) then use one of these connected to a socket on the router to do it!