Thanks to Gene Hoffman (Hoffmang.com), you can read the pro-challenger briefs that have been filed so far in Nordyke v. King, including an amicus brief -- largely drafted by Prof. Michael Kent Curtis, a leading liberal Fourteenth Amendment scholar -- on the incorporation question.

There might well be anti-incorporation amicus briefs coming soon; for now, the leading anti-incorporation argument is in the state's brief, which was also posted by Hoffman.