QUOTE (reneewood @ Sep 4 2008, 02:48 PM)

If we set ours up with usps priority mail international, aren't the correct shipping amounts added in real-time?
Yes, however, you would still need to supply the maximum weight allowed for the method to be viewed in checkout. Otherwise it will default to 0, for both the min and the max, and no rates will be pulled.
QUOTE
Also, hate to be an idiot, but we've never worried about additional taxes. Should we be?
That is really going to depend on where you need to charge taxes. Generally speaking you only need to charge taxes for internet sales in states where you have a physical presence (i.e. where you are incorporated, have your business license, etc.). Since our cart software is currently US centric, and you cannot set a shipping origin outside of the US, this is generally not an issue. In smartmms case, he apparently needs to charge tax for Canada, and needs to workaround for that.