Add the wpa_supplicant optional package. It should be stable and is working on
the limited set of hardware I could test it with.
By installing the wpa_supplicant one can now join WEP/WPA/WPA2 networks by
either selecting them in the network prefs/network status applet or using
"ifconfig <interface> join <network name> [password]". The wpa_supplicant opens
a dialog asking for more details if it can't connect with the given information.
Note that there is no way to automatically store that extra info right now, so
it has to be provided on each join. The configuration can however be stored
manually into the /boot/common/settings/network/wireless_networks config file.