You could either camp out in front of the store the day before launch, but just realize chances are you're going to end up waiting for a long while with a bunch of other people. You could do that, or simply wait and try to find it online, or try to find a preorder somewhere else. The last option which isn't the easiest mentally but probably physically, is not to wait in line and simply just wait for the hype to die down a bit and pick it up at the store in March or something. (I really don't know how long consoles are in demand for since I have been out of console gaming until my interest in the Wii. The last console I bought was Ps2, but I didn't buy it until 2 years after it was released. I bought N64 near the release date.) Like the n64, the wii is something I'm going to try to get as soon as I can.

I have several options as well, I think I've given up on the online ordering and I'm going to try to find my luck after Christmas for it since I'll be in the states (I'm in Tokyo, Japan right now). If not, I'll just wait until I come back to the US permanently in July and by then, Nintendo should have plenty of Wiis floating about the country.