Larry, maybe you could tell us about the speed, what type of upload speed do you normally get when sending a file to someone else?
I am posting this via a 802.11b network that my public library is using (I do their IT stuff) in place of some messy cabling. We are also looking at providing public access internet via wifi. If you can get an antenna up, anyone with a line of sight and who can run a soldiering iron can make a connection out to a couple of miles.
As to performance, this wireless net is faster thant the ethernet in the building. It is very lightly loaded though.