I know that some people were understandably upset and annoyed when I decided to stop new development on SQLitePersistentObjects. Although it's a project that I really enjoyed working on, I just couldn't justify spending more time on it in light of Apple's release of the far more mature Core Data in the iPhone SDK 3.0.
Although I like certain things about the approach I took in SQLitePersistentObjects better than Core Data (like not having a data model file separate from the data model classes), it would have taken literally hundreds of hours (at least, maybe thousands) to get it to the point where the performance and feature set were comparable to what Core Data already has. Even if we got the performance and features to a comparable point, there's just not enough compelling advantages over Core Data to justify spending more time on it. At least, that's the case for me.
But, I must say, that I'm happy to hear that development on SQLitePersistentObjects continues! You can read more here. I wish Andrew the best of luck with this project. It's nice to see the code I abandoned was adopted by new loving parent. So, if you're using SQLitePersistentObjects and have been dreading the move to Core Data, check the new version out.