Mailbag,
The new feature you are talking about -- to tie custom shipping to locations -- is on the drawing board, but it may be some time before this option can be fully integrated.
In the meantime, I can give you other options. You could create a second custom shipping method that ONLY shows up for orders over 70lbs. Then you can use HTML or some other method to have this method stand out in such a way as to get the attention of customers in AK, HI and APO.
The Shipping Type field could look like this -
CODE
<blink><strong><font color='red'>ATTENTION Alaska, Hawaii and APO customers only!</font></strong></blink>
And the shipping Notes field could look something like this:
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Please choose this option if you are outside the 48 contiguos United States, but within AK, HI or APO. Any other option will stop your item from shipping. <br><br><fieldset><legend>Shipping Policy</legend>Due to restrictions with USPS Priority Postal, we are unable to dynamically quote shipping for orders over 70lbs to addresses in AK, HI or any APO address. Please choose the highligted option <font color='red'>in red</font> above and a member of our team will contact you. Thanks! - MGMT.
I hope that helps....