Wide angle lenses for portraits? What are you, crazy?
Actually, no. I have used wide angle lenses for portraits before and they've worked out great. If you stay aware of your subject and the surroundings, you can actually create some gorgeous images. It gives another perspective to your portrait because it adds elements that would otherwise be omitted or cropped out due to your portrait lens' capability. Elements that could change your entire vision for a particular portrait.
The Phoblographer and the DPReview did a little piece on this. Check it!