With the Mendix 8 release use of the pluggable widgets I think that it would be nice to have a section within the App Store for these widgets. This would make it much easier to find.
Out of curiosity, what makes it different for you when its a pluggable widget or not?
I have some ideas, but like to hear your input. That would also help with coming up with a plan for your idea.
This is definitely something we look to facilitate in the near future. Will keep you updated.