It is strange that after the advent of such an invention as SkypeKit, no one has done this yet.
Actually such a gateway allows you to exchange messages with Skype users, using an existing bunch of clients with Jabber support. The licensed purity of such an invention remains in question, so that all references to Skype have been removed from the sources.
What is already working?
Almost all IM features are implemented (except for file transfer). For voice / video hardly anyone will take in the near future. ')
In order to make friends with Skype, you need SkypeKit with a valid key.
Ps. The SkypeKit license requires running the transport on the same computer as the client so that the “server software” or “software as service” will not accidentally exit.
Questions about SkypeKit can be asked at skypeopensource@conference.jabber.ru.