Getting Justin.TV streams on the Roku is not an easy task, and I'm not at liberty to share the code that does it. The last time I tried Veetle, I found that their HLS streams used MP3 audio instead of AAC, which is hit or miss on the Roku (mostly miss).
My Channels: http://roku.permanence.com - Twitter: @TheEndlessDev
Instant Watch Browser (NetflixIWB), Aquarium Screensaver (AQUARIUM), Clever Clocks Screensaver (CLEVERCLOCKS), iTunes Podcasts (ITPC), My Channels (MYCHANNELS)