Well, I cracked it open last night. Here's my random thoughts so far:
-The controller is actually surprisingly neat in the menu system. I'd actually like to try it out in a real (full) Wii game to see how it handles. It's a lot more accurate than I was expecting, and doesn't seem to jump around or anything. I also like the tactile feedback that it makes when "clicking" over an onscreen button. It's a little thing, but it adds a lot.
-I'm still worried about the IR emitter. I know it's probably low power, but it still concerns me. IR causes damage to eyes, and part of the problem is your eyes don't realize they're being hit by light, and don't react to protect themselves. I guess theoretically the Wii's lights are so low power it dosen't matter, but still...
I honestly felt weird pressure in my eyes after using the Wii for a half hour or so. I'm particularly sensitive to various types of radiation (I can "feel" many types of electromagnetic radiation, and radioactivity-my high school science teacher said that was impossible, and tested me...and I could instantly and easily pick out the container with a radioactive substance in it...he said Andrew...that's just weird, it shouldn't be possible")
So, yeah, I'm worried about it, even if I'm the only person on Earth that's concerned. I tried using it without the emitter, and sure enough, it didn't work at all.
-Wii Sports is lame. Super lame. Not my thing at all, and doesn't work well for me. It also doesn't seem to work when sitting down, which isn't my thing.
-I also don't like the design of the system. Like the 360, it has a HUGE external power supply. At least this one dosen't have a fan on it, but the cord is too short to actually reach my floor, which means like the 360, I have to have a weird setup.
-I also don't like it's kind of lame implementation of backwards compatibility. It's as lame as the DS Lite's compatibility. It works, but it basically just switches it to being a Gamecube. You can't use Wii controllers or memory cards, you basically have to power cycle the thing to get back to the menu, etc. Right now I've got the Wii on the floor since my Gamecube pad has such a short cable.
Weirdly, the so-called "sensor bar" has a super long cord, but the power cable is super short. Apperently people are using their Wii's on the floor?
Also the system's size really isn't that impressive. It's not much different from a Gamecube IMO (though quieter), and it's larger than my Playstation 2. It takes up more room in my setup than a Playstation 3 will because of that huge external power supply. So not too impressive. I kind of like it's looks the best of the three though, I guess, and the included stand is surprisingly nifty.
Overall, I'm very nervous about the health risks, but I do think Metroid Prime 3 may end up very interesting. I like the idea of physically manipulating things in the game world. It's been done before on PC games, but this might work better. The control pad also feels better in the hand that I expected it to-but judging by Wii Sports I'm not sure how well it actually works.