22a2b88b_on_of_XMPP_Jabber_IRC_and_PSYC__0
[IRC] hard to extend, kludgy, no binary data [XMPP (Jabber)] XML-like: extensible, inefficient, no binary data [PSYC] extensible yet optimized, framed, binary-friendly [0] 
Protocol Syntax ³
PSYC Comparison of XMPP Jabber IRC and PSYC
0