Come to think of it having
"Gertboard", Interfacing (DSI, CSI, I2C, etc.), and 'Add-Ons' seems quite confusing and somewhat duplicates the same things.
For example I have a question that is " If there a permanent pull-up resistor on Expansion Header GPIO 0, would it be best to use pull-up rather than pull-down designs for GPIO ?'. I'm not sure where I would post this as I am thinking of using a Gertboard, on the other hand you could say my question is Interfacing related or an Add On question.
Seems most logical to me to have just a general 'Interfacing (DSI, CSI, I2C, GPIO etc.)' forum.