The fact the the file sharing feature in the OBi202 uses forward slashes "/", it confirms that there is Linux in the OBi (Windows uses backslashes "\").
Member shawn_ has provided a very interesting "Proof of Concept" for a network CID box. Imagine an OBi with a built in CID solution. It would be interesting if Obihai could incorporate a similar Linux solution into the OBi itself. Although a Mac solution, it might be possible to port it to Linux.
Caller ID and Name sent to Growl on Mac
http://www.obitalk.com/forum/index.php?topic=3951.0
Obihai meet Shawn Bissell. (You're easy to find with the download link you provided. I hope you get some work out of this)
https://twitter.com/shawn_bissell
http://ca.linkedin.com/in/shawnbissell
https://github.com/shawnbissell/obicallerid