I have a Zen cart store ans we are using the 1.3.9a release and we also have the Shipwire shipping module installed.
You can view our site here:
We currently are not using the module because of what seems like a gross design oversight but is probably just my inability to think this through.
I have tested my Shipwire install and it is communicating with their server but we have hit a really big snag. Apparently each size and color combination needs it's own model #. For a clothing store with multiple size and color combos for each item this really isn't practical.We really want to use shipwire as it seems like a great service. Can any other store owners tell me how they solved similar problems? Thanks!