| Ali,
A few months ago I just went down PC world and bought a Belkin ADSL wireless router
I'm typing this right now on my home desktop PC which has an 802.11g spec wireless card in it.
I have my works laptop (Compaq Evo 610c) right here as well, which has it's own wireless card built in, and that is also connected to the same network (using VPN and using more extra security layers than you can shake a stick at to log on to my company intranet)
I have an older laptop in my sons old room (which is where the ADSL line comes in to the house and where the router sits). My wife uses this one for some study she is doing towards extra Nursing qualifications. That too is linked up to the router using one of the 4 RJ-45 ports that the router has available.
Next Thursday, I take delivery of a super duper new home PC and that will also be wirelessly hooked up to the internet.
I am not a techno geek (used to be but that was 10 years ago and I've forgotten everything I knew and not kept up to speed). However, I found it easy to set this stuff up. It's almost plug and play.
As has been mentioned previously, you just need to pay a bit of attention to security.  | 
Jools
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