motorhaven - 12:26 am on Sep 29, 2010 (gmt 0)

This will accomplish nothing except perhaps invade the privacy of law-abinding citizens and increase the cost of doing business. Criminals will simply resort to PGP/GPG and communicate via email or copy/paste the PGP encrypted string into the chat window. The provider never sees plain text that way so no matter what back door they provide you can't get to the real content.