If something like thats possible, what about
these? There are 2d and 3d versions starting at £15. But the 3d version is getting close to the wiimote price, so presumably that would still be better?
On second thoughts we could just use the Wiimote, I have seen a game use a Wiimote before at Warwick University and it worked really well with the motion sensor.
But I also think that OpenPandora should make their own "add on" for the pandora as an accelerometer, that way when programming a motion sensitive game developers would only have to program in accordance with the "add on accelerometer" and would not have to worry about different accelerometers and wiimotes etc.
Given that I doubt they could retail one for less than the Wiimote, if the community accepted the Wiimote as 'standard' then they are readily available, easily replaceable and then you get the standard you desire for developers. If the developers could reasonably make one better, smaller or cheaper then I'm all for it - I'm just not convinced it can be done.