I currently have about 10 metres of cable running through my house to network 2 computers both running windows xp sp2. I would like to get rid of the cable and run a wireless network. I have been looking at the USB wireless adapters rather than a wireless NIC. It appears from all that I have read, the 802.11g at 56mbps USBs work OK through a number of walls but as I would like to make an 'ad hoc' setup in an effort to avoid the cost of a router, I'm told there may be some security issues.
Does anyone have any personal experience or can point me to some further info on the subject?