For Unity there's always uScript which is quite good actually. I agree with ErekT. Gimme an exporter like Chowdren and I'll be happy. Pretty much most engines and frameworks export to native.
Yeah, fingers crossed Scirra start to take seriously the grievances users have with html5-only. I mean, it's starting to come around for the desktop platforms, but support for anything else seems either mediocre or non-existent.