My sister came over from the USA to spend Christmas with me.
She brought her laptop and PDA with her.
The whole University where she works is wireless as it her home.
All her students have wireless PDAs so they can instantly look up procedures, customer records, animal history etc.
However, she mentioned that she had her home done by professionals - same company that did the University - and she said it was EXPENSIVE for her home however it did include a satellite dish for the Internet as she lives in the country.
So it may be true that "do-it-yourself" kits are still in their infancy?