Seems like Nintendo is relying more and more on others' technologies this time around. Not that it's a bad thing necessarily.
Besides the IBM and/or ATi chips or whoever, you've got a variant of DVDs for media, you've got a slot for SD cards, which apparently can have .JPGs, now .MP3s, probably a couple supported video formats, a couple USB slots, Bluetooth, Wi-Fi which is routed through a PC...(oh, and also a general Apple-like aesthetic, for hardware and for its OS). And I'm probably missing something.
EDIT: Yeah, I forgot the Opera browser.
Anyway, the .MP3 support is kinda cool, if somewhat unexpected. I also would've thought DVD support would've been easier, but apparently not.