... everything looks like a nail.

There are many things that the Jabber community should be doing. Going after Tibco and the like is not one of these things.

> And how exactly is that space any different from instant messaging?

Reliable delivery is the most obvious difference. Note the use of "queuing" in the title.

> Wouldn't it be nice to command a fully integrated company from your IM client?

I'd prefer to use a web browser.