i'm not sure, but under certain circomstances, it might be a good idea.
these forums have several NTs on them, and having them is of mutual benefit; threads can get answers from an NT vieuwpoint, and NTs can get a glimpse of our world.
for that reason, i have considered getting some of my own friends on these forums, i have a few that are quite interested in the world of the aspergers.
however, one thing that i'd recommend very strongly: make sure your friend doesn't know/is able to find out, your username on here, that would create some awkward situations, and you'd feel less free to speak your mind