I am running Slitaz 5.0 live.
I found the place where you select wlan0
and I have the TazPanel-Network open on the screen.
I have it scan, and it shows the list of available wifi routers/networks/hotspots.
I select the one I want, and instead of launching a login asking me for a password,
it just re-scans the networks. (scanning, clears the list, shows a list).
It seems no matter what I do, it doesn't go into a login screen.
This worked out of the box, no config needed.
Running on an eeePC-1000he (Celeron).