Since the App World was renamed to just World, BlackBerry 10 apps have started showing up online when you search for them on the website!
My first app: BlackBerry World - ROT13 Encryptor
Random Apps with BlacBerry 10 in their names: BlackBerry World - Free BlackBerry Apps - Official Store
EDIT: Test my app! Let me know of improvements I can make before hand!
Here's another app you can test out! :) http://dl.dropbox.com/u/97328044/Amino%20Acids.bar