Yes, I have two desktop machines and networked together, and a Mac laptop which has Airport installed. The wireless router I bought is the Vigor 2600 We and can be seen at
http://www.seg.co.uk/ They are imported amd you may have to pre-order it so don't leave it until the last minute if that is the router you intend to buy.
I can, in all honesty, tell you that it works very well indeed, and the laptop works everywhere in the house and hopefully the garden too if we have nice weather next summer.
The distance from my router to the conservatory is around 30 ft.
It has a built in firewall and I use Zone Alarm for extra protection. I've found that a couple of Yahoo websites don't work unless I disable Zone Alarm to view them, but they represent a very small fraction of my surfing. As soon as I view them I just immediately enable ZA again.
The total;cost of the router was £273.78 inc VAT but bear in mind it has its own modem so you don't need to buy a separate one.
My experience of the system has been much much better than I anticipated and there have been few problems. All 3 computers are now running broadband simultaneously with an "always on connection".
Adept will have to answer the network question because he installed it for me. So just to remind him I'll leave that bit in my reply.
Do I just need a PCI card for my desktop and a PCMCIA card for my laptop in order to share broadband connection ? (Desktop runs Win ME and laptop runs WinXP - is this ok?)