I'm using eclipse on Mac, and your plugin would be something really useful. I'm aware that it's not available yet, but, from what i gather, the problem seems to be with designer integration.
I can deal very well with using an external designer. What I would *really* like is the rest, the project file integration, the editor integrations, etc.
My suggestion would be that the osx version of the plugin be a "lite" version, clearly marked as such, just with the rest of the integration. At least we would stop getting all the errors for "public slot:" :) .
I apologise if this is not the place to mention this, but I thought that the labs would be the perfect place for distribution of a test version of such a plugin (hint, hint :P )
Thanks, Gus