I purchased the bundle and they will email the files to your kindle. You have to go to your Amazon account settings and whitelist kindle@humblebundle.com, however, in order to receive it.
One of the big drawcards of buying a book on Amazon et al is that it's delivered automatically. I suppose these few clicks make it a hindrance for the lazy and having an automated process might make a few more sales.
I hope with all of my being you are being serious. I also hope it's worldwide and not limited to the US.
Most startups related to trying to shake up the media publishing biz pretty much exclusively say "US only for now, we're working on worldwide" and it never happens. :(
