The Nintendo DS Browser
(Amazon affiliate link) became available in the US earlier this month (although it had been available in Japan and Europe months before). Reading through the comments on Amazon, I learned that while the item is simply listed as the Nintendo DS Browser, it is actually specifically for the second generation DS Lite model. The Opera browser itself is on a standard small DS cartridge while a memory expansion card is provided in non-standard sized GBA card that only fits in the DS Lite model. So, if you have the first generation Nintendo DS, make sure you get a version specifically for that model.