Flying visit - have to go out in a few mins.
One of those wont work UB - or it would, but not for what youre wanting to do - it would be expensive as you'd also need to purchase 'air-time' which start at an additional £15 per month -
linky.
Those are for 'mobile access' with a mobile phone supplier.
I think what you were perhaps thinking is a wireless USB dongle which allows you to set up an '
ad-hoc wireless network'
http://www.amazon.co.uk/Netgear-WG111-Wireless-54Mbps-Adapter/dp/B0002LHX8O(Thats not necessarily - the cheapest it was just the 1st one I came across).
Be warned that ad-hoc wireless networking involves the other PC to be on...
and can sometimes have config problems and arent always the easiest to set up and may need some patience since the host IP is set by ICS as be 192.168.0.1, which can conflict with the router IP address.
/need to go - back later.