Fashionpro, I have had success having items shipped from some US stores to non US addresses. I've also had items shipped from within Europe.
For the US, my first tip is to pick a not-so-busy H US store as they would have more time to accommodate these requests. I pick H boutiques in smaller cities.
Also I would suggest you be very specific about the items you are buying when you are placing your order. I had specific items in mind when I called, having read about the availability of these items on the Inventory thread. My guess is the SAs will probably not be as patient if someone (and I don't mean you but just in general....) is calling asking "what is available?".
When I called, I kind of got to the point and said "I would please like to order XXX, XXX, and I live in XXX and am willing to pay for intl shipping."
Note that they will only ship to your billing address so while Baggiegirl has had success with a mail forwarding service, in my experience, the US boutiques I dealt with made it very clear they would only ship to my card billing address.
I am under the impression (I could be wrong but this is my gut feel) that they are willing to ship if you order a few (i.e. at least 2-3) items. I am just not sure if they would ship internationally for one item.
Also, I sometimes get the feeling some H boutiques are willing to ship overseas if they feel comfortable with the buyer's location. One of my best friends asked for something to be shipped to her home in Prague and the same US SA (who had helped me previously send items to both London & Rome) was like "I'm sorry but I don't think we can ship there"
Good luck!