According to Nintendo Europe, as long as you've made a single visit before the 11th, you're ok. Says nothing about visiting between the 1st and the 11th.

"To register for the Nintendo 3DS Ambassador Programme, you only need to make sure you visit the Nintendo eShop at least once on your Nintendo 3DS before 23:59 pm (Central European Time) on August 11th."

I'd absolutely love Super Mario Bros 2 on the NES. My favourite 2D side-scroller of all time. It's aged so well too. Other NES wishes include Metroid, Tetris, Marble Madness and Bubble Bobble. Those would be awesome. As for GBA games, i've not played too many, so i'm not particularly fussed as to which games they give us, but i'd definately like to play Metroid: Zero Mission.

I think people are missing the point with these 'free' games. They're not free as in its some kind of prize. It's compensation for having to pay more than most will. That's all it is. Whether or not you're happy with your compensation is another matter. This issue about whether or not is truly free is pointless, because its not meant to be. It's meant to make up the price deficit, that's all.

On that note, however, these 20 games will be near enough free for me. I paid £200 for my 3DS at launch. That came with Pilotwings, so you could argue that the console cost me £170. On top of that, the UK price drop is meant to bring the price down around the £150 - £155 mark, apparently, and so i'll have paid £15 - £20 for the 20 games. That's no more than £1 each. Not quite free, but a bargain none the less.