The Jessie installer did not give me an option for wireless (using ethernet). I subsequently saw, when starting the computer, a message about missing ath3k firmware. I used aptitude to install atheros and this message has gone away.
I then tried to use wifi-radar. This recognized the relevant names of LAN access points, but seemed to freeze on what I think was search for DHCP. It never got as far asking me for a password. I then tried iwconfig wlan0 essid "relevant name" key s:password and got the message Error for wireless request "Set Encode" (8B2A) : SET failed on device wlan0 ; Invalid argument. ls /dev/wlan0 does not show anything.