Boing Boing has an entry today on this:
http://www.boingboing.net/2006/03/21...al_materi.html
Online sexual material is obscene if any community in US objects
The Supreme Court of the United States has declined to overturn an important case about obscenity and the Internet, leaving anyone who publishes sexual material on the Internet in uncertainty about whether they're open to federal penalties.
By turning down this case, the Supremes have said that the whole country is now subject to the decency standards from its most conservative, anti-sex, anti-nudity corners; that the local standard from that place will become the national standard.