The default installation of Ubuntu should have a link to brainstorm in the default installation. Personally I'd put in system > help > Ubuntu Brainstorm, or create a new menu item system > contribute > Ubuntu Brainstorm.
I created that old dupe, I love the idea of brainstorm and using crowd-sourcing etc.. and wish it was better promoted, that's why I posted this idea, which (back when I posted it) was not a dupe...