I submitted the following to Nintendo via their contact form:
Hello,
please please please make the power adapter that comes with the 3DS in North America accept 100 to 240V. It’s very annoying that when I go on vacation I have to bring my PSP with me instead of my DSi because the adapter does not accept 100 to 240V just like my cell phone charger, laptop charger, camera charger, shaver and other modern gadgets do.
Regards,
Michael Tozzo.