NT locked goodsamaritan's post in OOT about the gay lisp. Probably because of the tone of good's post as well as OOT maybe not really being the right venue for serious discussion of this sort of thing.
But this is something I've always found strange and have thought about in the past. I did a search and found some interesting links.
http://joeclark.org/soundinggay.html - economist article
http://www.speech-language-therapy.com/codemix.htm - code switching and gay speech
http://www.newsandevents.utoronto.ca/bin2/020218c.asp - Researchers examine patterns
Lounge Linguists, thoughts?