Including Nintendo, who probably have another hit on their hands, going off that the first shipments sold out before lunchtime in Tokyo's electronics district. Which makes a lot of sense, when you think about it.
Japan has slightly more than one-third the population of the US but nearly as large a DS install base. Almost one-fifth of the entire Japanese population own a DS (compared to just one-tenth in the US). What else are you going to do over lunch?
While you're waiting for the DSi to launch in the US, probably sometime next spring, , or have a read through during the last month.