Jesus,
I am booting from the SD card, and using a Wireless-N 135, model 135BNHMW.
The driver must be installed because the command "ifup wlan0" results in a good connection.
And, like FocaaBR, I have added "auto wlan0" in /etc/network/interfaces without apparent effect.
Thanks,
jlz
{This week I am visiting a brother-in-law who is running a WEP network,
and I have not yet figured out ANYTHING about using wpa_supplicant in this setting.}