Cool! Very nice project. I wrote some similar iMessage related clients here:

https://github.com/CamHenlin/imessageclient - this is a terminal based one that works over ssh

https://github.com/CamHenlin/iMessageWebClient - this is a web based client that I used to do iMessages on a windows phone for quite a while

And I have some more iMessage related projects on my GitHub as well. Hopefully these projects give you or others some more ideas for iMessage related stuff