I've created a free Hacker News reader for BlackBerry 10. Currently it supports favouriting posts, searching, and reading comments and articles. It can be downloaded here from BlackBerry World: http://appworld.blackberry.com/webstore/content/34175888/

More features are coming soon, including logging in and a neat active frame.

It was built using the BlackBerry Py project, and the source can be found on my Github here: https://github.com/krruzic/Reader-YC I'd love contributions, feedback or requested features for the app. Thanks for checking it out!