This add-on for the e-commerce package allows you to set shipping rates that are based on the number of products order, the total price of the order, or the total weight of those orders.  The rate is based a values entered in to a table.

Essentially, it works like Yahoo's table-based shipping

Added in version 1.1 - Zip code based shipping.

Use as your own risk - I try to support this block as best as possible, but because it is free, support is limited.