Public Instant Messaging Server

I am testing Notes 6.5 and would like to look at the Instant Messaging feature. However we still use Domino R5 on the server so I was wondering if IBM or anyone else hosts a server that I can use to host my IM session whilst I try out the IM features.

Does anyone have the settings I need to use a public IM server and how I can register for one?

Many thanks,

Richard

Subject: The IBM demo server

http://stdemo3.dfw.ibm.com/welcome.nsf?open