If you havent got the outlay for a router then you are half way there.

PCMCIA/USB wireless dongles are £20 from Pissy World, but dare say can be found cheaper on the web/ebay

WAP - £35
PCMCIA/USB/PCI card - PCMCIA £10, PCI £15, USB £10 - £20

Or this: http://www.ebuyer.com/UK/product/117886/rb/27591374094

Wireless router + USB Wireless for laptop/PC £37

I would presonally go for this though: http://www.ebuyer.com/product/48546/...rb/27591381690

All prices from ebuyer and inc VAT.

For me its a no brainer. Wireless all the way.