I've scanned the web for the latest information on working with IP Multicasting. There's a bunch of old (obsolete?) information dealing with MBONE, and pointers to http://www.ipmulticast.com which doesn't respond. 1.) Are there any pointers to URLs that deal with issues to set up for both incoming and outgoing multicasts? I can't find many examples that show this from an ISP point of view. 2.) Is it worth my effort? In other words, what % of the internet audience is capable of receiving multicast IP from an audio feed? 3.) Are there any examples of audio feeds that use Multicast I can test with? Thanks, Mike N