For whatever reason, Demon's Souls continues to sell like hotcakes in Japan. We say "for whatever reason" because the reviews have been good but not incredible, and it certainly isn't available in North America, so we can't play it.
Anyway, it appears that the first-day sell-out from a week ago wasn't a fluke. According to PS3Center, first-week sales have now reached 37,000, which is pretty impressive for only seven days in one region. In fact, it's the 4th-best performance for a new IP on the PlayStation 3 in that country, as only White Knight Chronicles , Valkyria Chronicles , and LittleBigPlanet (the latter at only 47k) managed to top Demon's Souls with their first week sales totals. The unfortunate aspect of this scenario is that Sony and From Software don't appear to be meeting the demand, as the game is extremely difficult to find on store shelves. It's always sold out, apparently, which means that nobody really anticipated the demand for this western-style RPG. Perhaps it was advertised well – seems unlikely – or maybe it's just really very good, and Japanese gamers are starved for RPGs on the PS3. Who knows? The worst part is that From Software has yet to confirm that this title is even coming to North America or Europe. But with this kind of response, how could they keep it restricted to Japan…?
Right now, the success of Demon's Souls is a mystery to us, but hopefully, we'll learn of its massive appeal in due time. If it's a western -style RPG, shouldn't we get it?