I'm surprised we don't have one of these yet: if you are sitting around some time and think: "Wow, why hasn't any Wii game used the remote to do this?" Write that idea down in this thread, and we discuss what can and should work with the Wii Remote in the future.

The first three that popped in to my head: using two Wii Remotes at once for a single player. Dual Pistols for each hand, for example.

Use the microphone! Why did news of this simply fade away? Do we recall that the Wii Remote apparently has a built in Mic? Why hasn't this been used if so?

Use some other portion of the body besides the hands for play. For example, putting the Wii Remote in your pocket, and basing the controls of the game off the movements of your mid region. Perhaps this can be combined with a second remote that you keep in your hands.  

I was told Wario Ware does this.  Or something like it.

 Vague semblance, yes. You hold the Wii Remote by your hip, and doing simple things like jumping. That's a pretty big difference from actually putting it in your pocket for extended play, and having full game mechanics built around more complicated body motions. 

Use some straps to tie two wiimotes to your ankles, and use it for playing football games like Pro Evolution. Would kick butt.

cricket! im hangin out for it...

A new Leisure Suit Larry title and you would use the wii-mote as....

Nm. That joke is so laughable I can't even finish typing it.

Red Steel did this already to a limited degree and Dragon Blade went even further with it. 

Used in an Oblivion type game as the hands! Or a Spider-man FPS where you swing, web and climb walls in the same manner.

What I'd love to see most is the pointer functionality used to bring RTS or Baldur's Gate type RPG to the Wii. Or more games like Zack and Wiki or Sam and Max.

Or my favorite - used as an in-game nunchuks and you hold the cord and swing the wiimote and nunchuk around wildly trying not to sack or smack yourself.

Got to say, cricket could be so cool, just hope they do it soon and they do it right. Wonder how big the Wii is in India as that is a market which could sell HUGE amounts of a Wii cricket game - not sure its officially released there though. Otherwise its down to the market in the UK and to a lesser extent Australia to see that game do well.

A lot of this may have to wait for the next generation of systems, and some is impractical.

You could do some things now, like dual-wielding guns or attaching the Wiimote to different body parts, but many of these applications don't make for viable games for much the same reason that most PS2 games don't make use of the Eyetoy - your game effectively requires multiple controllers, so you lose a lot of potential sales. More gamers are going to have multiple controllers than have some other kind of peripheral, but it's not going to be all of them. Certainly once you go up to requiring three or even four remotes, your market is down to almost nothing.

Regarding more sensitive applications, like precise webslinging, 1:1 sword/hand use, or Leisure Suit Larry, the Wii might not be able to handle it. For the sort of analog (in the good sense - continuous) control that we're looking for, it seems to me that you'd need a fairly robust physics engine. Maybe it can do it, but I'm not sure. Not using set animations for different movements might also make things difficult - I'm sure that takes some rather hefty processing power.

Not that there's nowhere left for the Wii to go, but there are upper limits well below any imaginable use for a motion-sensing controller.