There's lots more coming in 2015. We've had many requests about how to begin contributing so we put together some Pioneer Projects. We're constantly adding to this list and they're suitable for various skill levels.

https://github.com/mirage/mirage-www/wiki/Pioneer-Projects

Unrelated to the TI-83 calculator MirageOS - http://www.detachedsolutions.com/mirageos/

Would be quite the feat to do IP networking on that hardware..