Sorry for the double post, but I thought I'd give some people help in getting a copy. Square Enix has now allowed Bronze members to order FF7:ACC with the FFXIII demo. In other words, you won't need to register any Japanese software. Here is where you can buy it:

Square-Enix e-STORE

Unfortunately, it seems that the one with the PS3 has been sold out, so if you preordered that one on play-asia, I don't know if you'll be able to get it. Also, you will need a friend from Japan who is willing to use their credit card to pay for it and also have a place for SE to ship it to so your friend can ship it to you come April.

If you cannot order it from their website, then how I did it was get it off ebay, since Amazon Japan is classifying this as a video game and hence un-importable. Check this search "advent children complete" periodically and hope that there's something there. As of this posting, there are a couple items listed there.

advent children complete, Collectibles, Video Games items on eBay.com

Also, here's one more that you'll miss using that search:

PS3 Final Fantasy XIII 13 playable demo disc et. JPN PO - eBay (item 370152828786 end time Mar-02-09 07:28:38 PST)

You can try to best offer that last one, but I offered him $80, and he rejected it.