I do essentially ALL of my shopping online, so I’m going to start compiling a list of websites that ship to Puerto Rico. Unfortunately, most websites that I’ve happened upon do not, but these are the websites that I have so far:
LinensnThings.com - Bedding and home items.
Faucet.com - A great store if you’re building a house. They ship to PR, but not to P.O. boxes.
Ulta.com - A beauty supply store.
Zappos.com - The webs biggest shoe store (plus sunglasses, clothing and more).
PetEdge.com - A huge selection of pet supplies.
Target.com - Target ships some items to Puerto Rico. Although they say they don’t ship to a P.O. box and then sent some of our order USPS.
LaLaLingerie.com - Womens clothing and accessories.
ViciousStyle.com - Belts, belt buckles, clothing and accessories.
WilsonsLeather.com - Leather clothing, purses and accessories.
Delias.com - Womens/teen clothing, shoes and accessories.
Cooking.com - Just about everything you could need for the kitchen.
Organize.com - Organizing solutions for the home and office.
TheSpiceHouse.com - Merchants of exquisite spices, herbs and seasonings.
SolutionAccessories.com - Changing towels and terrycloth seat covers.
OfficeMax.com - Not only does Office Max deliver to Puerto Rico, orders over $50 are delivered for free.
I will be adding more websites that ship to Puerto Rico, as I happen upon them. 
Hi guys! We are in the same shoes as you: Moving to Rincon next month and can’t wait! Summer, this list is a great idea! The trick is finding websites that not only ship to PR but also ship to a PO Box…
Here are some more websites I’ve found so far that do both:
Cooking.com (kitchen stuff etc)
Organize.com (does exctly what it says on the tin!)
http://www.thespicehouse.com (a great range of fresh spices)
Best of luck with your move!
solutionaccessories.com ships car seat covers to puerto rico!
Miri - Yes, the P.O. Box thing is tricky, but I’m seeing more and more website shipping via USPS, which is bueno. I’ve seen UPS trucks allover Rincon, so I know that they deliver there AND we know our physical address, so I’m wondering if UPS would deliver as well. I bet that they would, so we’re going to conduct an experiment (I’ll ship something via UPS and see if it shows up!)
I’m very surprise at how many people are moving to Puerto Rico…If you’re moving to Rincon, it will only be a matter of time until we bump into each other, Mia!