<div dir="ltr">As a summary to the  jabber server thread .  A jabber server is any server that uses Extensible Messaging and Presence Protocol (XMPP). The challenge with jabber (xmpp)  is that the protocol does not scale well.  As the number of users increases, the overhead required to manage the users increases.  The two problems are bandwidth usage and server load. OLPC has been customizing the ejabberd server to scale by improving the code base and adding extensions which reduce traffic. Ejabberd development has been superseded by the gadget sever development which is being done by collabora under contract for OLPC. Remaining open questions/issues. Stability of sugar to handle jabber server crashes. Access control mechanism to limit the user per server count. Estimated time time for gadget development. Stable collaboration APIs for Sugar. Creation and publication of additional server. Care and maintenance of existing servers. Am I missing any big issues/open questions? thanks david </div>