you're actually requesting two things here, and I believe both of them are being worked on.
many have requested the boutique packaging option be an addition to zenfolio's mpix offerings. something zen and mpix have to work out, and I'm sure they will in the future.
the other often requested feature is to allow the customer to place the order, but have orders sent to the photographer so they can deliver them to the customer themselves, either ship in their own packaging, or hand deliver, but either way, ship to the photographer so he/she can do what they will.
currently, if you choose to self-fulfill orders, meaning the customer places the order and zen forwards it to you, then you can fulfill however you want, with whomever you want, package and deliver however you want. Gives you great flexibility, just more work on your end. (you also collect payment from your customer yourself). :)
and I see it's your first post, so welcome to the forums!
~Kevin
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