What will your shipping plug-in provide? I'm interested in dimensional weight calculations and offering only one free shipping option (not for all options) when selecting the product's 'Free shipping' checkbox
The shipping plugin works with the rules of a transportation company here in Colombia, where there are different fares for each city and different prices and rules depending on weight and package size, it does have dimensional weight calculations.
I have not started to rewrite it, by your suggestion I'll make it more generic so it could be useful to other scenarios apart from this local transportation company.