Multiple Ship-To addresses and sales tax

[Nick Temple <ntemple@CommerceStore.com>]

Hello,

I'm implementing a gift system that needs to allow the shopper to
optionally specify a ship-to address on a per-product basis.  I can get a
drop down list and associate that ship-to (useing the userdb) with each
product, and it seems to be working.

My question relates to sales taxes, and how that can be handled.  Is there
a way to calculate tax on a product-by product basis, taking in a different
percentage depending on where the product is being shipped?

A solution I've considered is to charge taxes on the bill-to address
instead of ship-to.  Is this a viable solution? How would I change (or
emulate) the [salestax] tag to use b_zip instead of zip?

Other suggestions greatly welcome.

Thanks,

Nick