org/tooltip/tooltip.js

you can create a global / easy to setup one / at:

org/globaltip/globaltip.js

globaltip would:

steal.plugins('org/tooltip').then(function($){

  $(document.body).org_tooltip()

})

[EDIT: Take the example lightly. It's not a real implementation, just an example I slapped together while writing the post; Trying to get the use-case across.]

I read some very valid points you brought up about publish/subscribing to global channels in other posts, and I see how those points can be applied to global controllers. I'll see if I can find the other post you're referring to.

I don't quite see the problem with this Controller though. It's not extensible, or easily changed for different implementations of a tooltip, but if the implementation is consistent for all tooltips, it still seems to be a solution. I refrain from calling it a "good" solution because I'm still learning the appropriate way to use events w/ JSMVC (Please, pardon my ignorance :)).

I may be interpreting your response incorrectly, so these responses may not apply:

Would it be possible for you to provide a small outline of a Controller that would be more appropriate to use in a case like this?

I mean, lets say for some crazy reason you wanted two different tooltip widgets on the page or another show-tooltip.  It's unlikely yes, but I try to make widgets as flexible as possible.