I would like to see the shipping terms (currently the FOB entry) changed so that standard INCOTERMS could be used.  Technically FOB (Free On Board) is used for ocean freight.  I would humbly suggest changing the 'FOB' to 'SHIP' and possibly  expanding the text field a bit. This would allow you to properly enter detailed shipping terms.
 

All documents that the customer/vendor will see are end-user customizable so that you can change the description to you want.
 
We currently use SO/PO Notes to add shipping notes that won't fit in the standard field. Customers/vendors that always have non-standard instructions have them entered in their AR/AP notes, and they get pulled in as the SO/PO is entered.