This one is for Aaron, I was too slow to respond during the Beta phase so I'm starting a new thread for it.
The weight and calculated shipping stuff looks good, but I noticed that there is no way to accommodate weight levels for product variations.
In my use case, pretty much everything that is sold on our network is by weight. Variations are added in reference to greater weight (Variation 1 = 250 grams; Variation 2 = 500 grams; Variation 3 = 1 kilo; etc).
Attaching weight to variations will make the calculated weight shipping modules work better, otherwise, when it comes to sites where quantity variations can be based on weight, the modules are unusable.