nope, no dice.
/etc/network/interfaces either doesnt exist or I'm not allowed to change it (despite sudo).
putting wheezy on my SD and starting over.
The reason it won't let you edit it, is because the /etc/network folder doesn't exist by default.
I didn't have to do anything in the guide anyway.
The Wicd tool is included with the MinePeon dist. (At least it is on 0.2.2), and worked fine for me.
I didn't follow the guide mentioned previously. Instead, once logged in, I ran
$ sudo wicd-curses
P for prefs, set the Wireless Interface to wlan0, then hit F10 to save.
R for refresh to scan for wifi networks.
select your netowrk, and hit the right arrow to configure settings. Then F10 to save.
Again select your netowrk (now configured), and hit C to connect.
The status at the bottom of the screen showed it connect, authenticate, get an IP, and then show a status of "Connected".
Hope that's helpful.
If this has helped, feel free to send a tip my way:
16vhugBL181T63nHgWmntPKLGnWoNykxwc
Edit: Fixed/clarified/accuracy.