There are one million factors to consider when setting up a business. Somehow I don't think "What if it hurts when we leave the country?" is all that high up on the list.

If someone comes up with a device that uses something like this - but with the input at the back of the device - I'm sold. Just make some dints and bumps so that my finger knows where it is.

If 10am is the new 9am then 1am is the new midnight. Give them some time to adapt and they'll still be late for school

Sure, they probably sold a few Kindles this Christmas. But my guess is they compare annual low with annual high here. Who the fuck buys paper books on Christmas day?!
- You're guaranteed a long wait for the item to arrive in the post due to holidays.
- You're busy with whatever family-holiday thing you do.
- It's a bit late buying that book as a gift.
- If it's for yourself, you probably bought it already.. when you bought Christmas gifts two week ago.
- You've already got lots of new stuff.

Rubber hosing is a potential issue, but there are 2 factors that limit the risk:
1) The written receit only needs to be kept until your entry is confirmed in the public records.
2) You are free to hand your receit over to anyone you trust and they could verify the public record for you. This could be individuals or an organisation.

If you put your receit in a box together with 1000 others immediately after you have voted you reduce the risk of having your vote exposed. You do have to trust the people/organisation looking after that box that they will fulfill your obligation to check the public records, though. But you're free to choose whom to give that receit to yourself.

How would it be easier to demand someone to reveal his vote number than demand him to reveal his vote?

The mapping from you to your vote number has to be yours and yours only. If that is not ensured, I agree that this system is broken. I don't see, however, any reason why that mapping would or should be revealed.
(See also reply to Mr. Freeman.)

A receit from the voting machine would take care of that. You get a receit back from the machine stating your voter number and your vote. It does introduce the problem that you have to carry a piece of paper revelaing your vote for a while, but you only need to keep the receit until you have verified that the same voternumber+vote combo is registered in the official records. Alternatively you could hand your receit over to someone you trust. If $yourfavouritetrustworhyorg is present at the voting station, you could hand it over to them immediately and let them monitor the official records.

Rather than focusing on the machine itself it is much more important to make sure that the results are verifiable. Here's my take:
1) Give the voter a randomly chosen voter number.
2) Reveal the vote for each voter number in some puclic channel. (Yes I mean print each and every one's vote in the newspaper)
3) Extend voter's obligations to include reading the newspaper the next day.
4) Have volunteers count the number of people entering each voting station.

If everyone is happy with his own entry in the newspaper and the volunteers are happy with the number of entries, then the election went well.

All this focus on securing an inherently insecure channel..I suggest we instead make sure that if the votes are not OK then it will be discovered after the election? I mean, if anonymity weren't an issue it would be as easy as having a list at the library after the election with names of people in one column and whatever they voted for in another. If everyone is happy with their own entry and the list doesn't have bogus entries, the election went well. Since anonymity is an issue, let the voters draw their receit number from a hat and use that number in the library list instead.

I get it. It's a local law enforcement inspection device disguised as a fake ATM

Yes.. Nice, wet, rainy winters in addition to those nice wet rainy summers! Norway just can't wait.