@LubosD
Did you happen to take a look at 'ringo' at all?
http://gitorious.org/ringo
...which was a codebase that briefly appeared (with the aim of running Mac apps on linux) and was worked on, but hasn't seen any recent activity. It does look though, glancing at the commit log, that the developer did get at least _some_ code working/running;
http://gitorious.org/ringo/ringo/commits/master
I'm not sure how relevant and/or applicable any of their code may be for your purpose, but you never know, it may be worth a look.
at any rate - your project certainly looks interesting and i've had a few looks at the darling website - so here is hoping you can get some useful working code, while also gaining some traction and interest from other developers/contributors!
cheerz