How geographically big can a Wireless LAN be?

["Nick Towers" <nickt@xxxxxxx>]

In a recent post on UKHA_Buy, the following statement was made about 
802.11b Wi-Fi compliant PCMCIA cards.
"With 24 dbi antennas at both ends, I have gone 8 miles with no 
problems"

Work to home is about 6 miles. At work I have a not particularly fast 
but "always-on" internet connection (Tele2). No adsl is currently
available at home so I'm on dial up, not surprisingly I'd prefer to 
be always on. Currently I have no wireless networking. Might it be 
possible to link home & work via wireless LAN? How? What kit needed?
Rough cost? Is it legal? Do I need uninterupted line of sight?

Any help/advice appreciated.

Nick

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