I like the idea here, and would love something like Wolfram Alpha with this kind of practical materials information. And questions about packaging and shipping. "How do I ship canned soda?".

Do you often have questions about that? I figured, unless it was flammable or fire arms, it usually goes in a box?

I meant pricing comparisons -- is it worth shipping item as media mail, fedex ground, ups, usps parcel post or priority, etc. And packaging advice for different kinds of things (like, standard sized boxes).