[quote name='Wompdevil']I think you are late if you didn't get it yet. You had to update the 3DS and log onto the E-store before midnight of August 12th which was when the price drop kicked in "officially". Anytime after that and it is too late.[/QUOTE]
looks like the program has been exteded for the UK
"If you bought your Nintendo 3DS system before August 12th but missed the deadline to join the Nintendo 3DS Ambassador Programme, you'll be pleased to hear you're still eligible to register! For information on how you can still do this, visit our Nintendo 3DS Ambassador Programme page here.
For all consumers who purchased their Nintendo 3DS system and accessed Nintendo eShop or conducted the recent system update prior to the 12th of August, you will have already qualified to receive your free downloadable software. We’ll be providing an online tool soon to allow you to confirm your status. You can also find more details on this at our Nintendo 3DS Ambassador Programme page here."
and another article here:
http://www.vooks.net/story-20362-Nintendo-Extends-3DS-Ambassador-Program-until-September-30th.html
Missed the deadline for free NES and GBA games? Nintendo adds handy mail in option. .
Gizmodo Australia reports you’ll be able to register until September 30, although it’s no longer as simple as merely connecting to the eShop. Now you’ll have to download a PDF application form from Nintendo’s website and mail them a hard copy alongside some proof of purchase.
Although this extension program was initially only announced for Australia, Nintendo of Europe and America have since followed suit with similar plans. Although as of the time of writing, only the European website has any details of the extension, although it does mention a new method of registering not in the original article, involving friend codes.