Check out the newsgroup alt.movies.visual-effects for good discussions on
a range of digitally related topics.
I'm also doing research in this area and have made numerous contacts on
the web which led to interviews down the road.  I suggest you browse the
newsgroups and CGI related pages (you can't miss with running a search on
Yahoo), as well as cinema newsgroup/webpages.  For periodicals, check out
Interactive Age, Digital Video, Wired and, most importantly, American
Cinematographer and Cinefex.  These magazines cover most of the major
elements involved with digital filmmaking technologies.
Best of luck!
 
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