Requirements: stability, support for MUC with the external connections, transport ICQ(preferably), the freshness of the server software, administration, "which is not the same"(in other words, it would be someone to knock and solve problems speaking either in Russian or in English), password recovery via email/other a Jew(not necessarily).
Tried multiple servers, stayed on jabber.ru but after 1 hour I couldn't log in, we have decided that we need to look further.
Google, VK etc do not offer, I want a full implementation and support for xmpp MUC with the external connections.
Rent your VDS or jabber server too not to offer is a fallback.
By the way, is it possible, using Google as jabber server, make an alias? I want jabber to use a different username, but it is not creating a separate box.