The Gatebot documentation is at

Recently similar approaches have been taken by social web apps such as and

Interestingly they did not opt for the approach of providing login servers and XMPP's ad-hoc command interface

The opensim people have taken a similar approach: is a project that is equivalent to using psyced with an active gatebot (talamasca requires an extra ircd however).

See also Gateway for other gatewaying approaches.