Knitty.com is my 2nd most favorite site (KH is 1st of course)... I went to their archives and searched for "online" and got 10 pages of links. Here were 3 from just the first page that appeared to be relevant to Kim's request:
http://www.knitty.com/demographics.html (this show the results of an online poll they ran in 2005)
http://www.knitty.com/ISSUEsummer06/FEATpodcasts.html (this discusses podcasts)
http://www.knitty.com/ISSUEspring04/FEATbreakingaway.html (this discusses expanding knitting skills and outlines ways to do that including using online magazines (like Knitty), weblogs, knitting groups, and message boards (like KH)).
I wish all these sources had been available to me when I was working on my degree. Despite the fact that I love libraries and books, finding just the right material was very difficult, and I spent more time trying to find info than I did writing up the papers for my classes.
Good luck with your research Kim!!!