Which feature is missing? Just drop me a note.
The transports can be found by searching "jabjab.de". New transport are only installed for jabjab.de, but are available from any domain. In your Jabber/XMPP client, you usually have an option like 'Service Discovery' to change the domain name.
Right. First, have look at Status. The transport may have crashed. If its running, shit happens. There is a good chance, that the company behind that transport changed something in their protocol. It need to be fixed first. To speed up things, you might offer your help to the developers.