And I'm going to try to get python plugins working on Sunday afternoon.

I was just curious as there are many different types of 1D code and the 2D codes can explicitly say which app/plugin they want to handle them depending on what text they contain.

What are the specifics of your application? Do the barcodes already exist on whatever you're scanning (in which case you should know exactly what they are, or can give us an example image) or are you doing some sort of proof of concept and therefore can choose whatever you want?