What I have found so far with my Droid is that it will not attach to a router if the SSID is hidden.
Obliviously, if you enter the SSID and the correct password the Droid should login into the router even though it's not broadcasting an SSID, but mine won't.
I had to adjust my router settings to broadcast it's SSID before I can get to it. I'm not too concerned because I'm using Mac address filtering and WPA security.
But I would feel better knowing my address isn't being broadcast across the neighborhood.
Ron W.
I belive mine is bradcasting in N. It has never been seen by the droid.
Droid does not use "N"