This is purely anecdotal, but almost every place around me is sold out of the single wand pack Move units. I'm wondering if maybe they had a low production run for the first batch. Unless I'm missing something, they've been kind of low-key with the launch marketing - I haven't seen that many ads or displays or anything. I guess it makes sense to save the big advertising dollars for a bit closer to the holidays, but it just strikes me as a little weird.
Big problem (I think, anyway) is package confusion. Look at how many different packs they already have - single wand, single nunchuk, wand + camera + game (but no nunchuk), camera alone. They're depending on salespeople to explain what a customer does or doesn't need to make this thing work, and a salesperson is gonna try to upsell you that $100 pack + $30 Nav controller every time ("You need ALL this, trust me.").
Also, there's hardly any games to play on it right now other than a few variations of shit you've already played before. Most everything is coming next year (including about a bazillion upscaled Wii ports, I'm guessing).
That said, I'll probably pick up a wand for shooting games and just fucking around. I already have a camera I bought for LittleBigPlanet (which turned out to be a huge pain in the ass to use).