Hi,

not exactly what you're asking, but you might find it useful..

I connect to my access points using:
dbus-send --type=method_call --system --dest=com.nokia.icd /com/nokia/icd com.nokia.icd.connect string:$IAP uint32:0

replacing $IAP with the name of my access point.

I got it from here:
http://www.gossamer-threads.com/lists/maemo/users/13694