Yes, that finally did the trick.
It seems the framework could not be (cross)loaded from The Unarchiver. If you compile a version with debug output around the framework loading point (I normally use something like "ive found the path here, im using that path there" when i'm to lazy to use a debugger), post the link to the zip and I will verify this.
And/Or giving me some pointers to some good Xcode/ObjC introduction/tutorial for regaled python/java/xslt programmers would be even better - so I could get my hands dirty without whining next time something breaks... ;)