what do ineed now ?

i have just oredered bt home hub and my pc dosent have a wireless card , any recomendations on what to get i looked on ebay and ther are so many differnt types and speeds i feel a bit lost .

bt voyager 1055.

connects through USB

and that little thing is it ,

Yup thats a wireless card!!

If you want you could save yourself some money and see if your computer has an Ethernet port.

Looks similar to this:
http://www.microsoft.com/library/media/1033/windowsxp/images/using/setup/winxp/computer-connect-ethernet.jpg

It wont have the cable plugged in but if your hub is going to be close to your PC you could just connect it via Ethernet which would save you buying a wireless adapter and its more reliable. The cable to connect is included with the home hub.

yes my pc does have ehternet built in to the motherboard, i have it linked to my other pc , so i can just unplug it . will i need to reconfigure it at all .?

Well if its linked to your other PC and you don't use it then you can use ethernet to connect to the hub if not its wireless or second PCI ethernet card.