Public Chat in OpenSim
Public chat on Ocean Grid is not publicly viewable on any internet channel, given the potential privacy implications: nobody within an OpenSim region would be able to see who is logged on to the chat channel and therefore cannot know who is listening. Only administrators are able to see public in-world chat via a private IRC channel.
Use private IM or group chat if you want greater privacy, as this cannot be heard even by administrators.
Instant Messaging via Jabber and IRC
However, we are still using both XMPP and IRC on a freely accessible server. This uses an interserver called PSYC, which is backwards compatible with Internet Relay Chat (IRC) and Jabber/XMPP.