I have SBC, but it kind of sucks! I haven't played console games with it but for shit like MAME and that, it works well enough. As for the DS, you need either a wireless router or a wifi adapter.
http://www.amazon.com/gp/product/B00...sr=8-1&seller=
They ain't cheap and are hard to find. I got one on ebay for 18 bucks, it supposedly works for the Wii too but apparently not perfect. Yet, DS wise, it has worked for me just fine. The only problem is that your computer must be on for it to connect. So maybe a wireless router would be better for you. I never had any luck with wireless routers as they ended up being a piece of shit, so whatever works for you.