I guessed right! Core Data (scroll down) uses an SQLite backend =) Anyway, looks very interesting, and I like how it is retargetable for different backends, presumably transparently. The whole Objective-C thing is kind of annoying, though. Wish they'd standardize on a higher level language for app development, at least something with real garbage collection, if not a scripting language (PyObjC is pretty nice, I hear).