PSP in Japan still seems like an unnaturally big jump. I know MC already reported similar figures, but I'm eager to see what Famitsu and Denegeki say...
edit: okay, just saw that there were multiple new PSP SKUs released this week. Dengeki reports 62k for the week with 40% of sales coming from the new SKUs... makes more sense now, given that the best selling new PSP game (another .hack spinoff) didn't even sell 62k itself.