If your wireless card support the Access Point mode you should be able to connect with it, but keep in mind that you'll need to get an Internet access from another mean (wired connection) to the laptop which act as a bridge between the ISP and the console.
From past experiences, DealExtreme is a choice you can consider. If you're not in a hurry, you can save over the slow shipping. Plus they have a ton of those small pieces of equipment, like cheap HDMI cables, etc.
I used my R4 in the past, and I currently use my AceKard 2.1 + EZ 3in1 with DSLinux. As said above, my virtual keyboard is also a bit imprecise, but it did that on my R4 too. So I guess it's DSLinux itself that is not calibrated properly.
Clubhouse Games, if you want to play some games like Texas Hold'em, Chess, etc. Only require one cartridge for up to 8 players, depending of the games. (Obviously, only two users can play chess at a time)