Ted
If successful, it could be used to take broadband to rural areas which cannot get it by cable or over the phone line.
The trials are part of BT's pledge to offer broadband to all of UK by 2005.
I think you'll find that BT intends to use wireless only for the few areas where they have not now issued triggers figures for ADSL (i.e. the number of subscribers who need to have registered an interest with an ISP to 'trigger' the exchange upgrade).
You'll probably know that BT issued triggers for almost every exchange a few weeks ago. That means that they can now claim to have made BB 'available' to almost all of the UK already. Smoke and mirrors...
But it does mean that it could be worthwhile getting some sort of campaign going for your area, depending on the trigger required. There's a link to all the exchanges, their trigger numbers and current registration figures on adslguide http://www.adslguide.org.uk and if in Norfolk look at http://www.broadbandnorfolk.co.uk - there is a link to a league table for norfolk exchanges - the Norfolk League - on the front page.
Syd