You can snag your own for 1,500 yen (about US$20) and considering the line up, it may be worth it depending on your love for 3D... and dual analogs. Allow me to direct your attention to the following titles:
- Monster Hunter Tri-G
- Metal Gear Solid Snake Eater 3D
- Kingdom Hearts 3D [Dream Drop Distance]
- Ace Combat 3D
- Dynasty Warriors VS
We're not sure yet if the games will actually require the addon or simply support it, although games which do support the pad will be marked with this icon:
The Slide Pad will require a single AAA battery, so no additional battery for the 3DS itself like some people hoped. While the titles above are scheduled to head to North America and Europe, there's no word yet on whether the device is as well.
Then again, you could always just pop over to Japan and pick one up. NBD.