I have put a small presentation on slideshare on DomDisc for Android and the Domino Data API. A very quick introduction to the core workings that make it possible to "replicate" from a Domino Discussion database to an Android app.
When you browse the slides you might notice that you now can configure the app to replicate with a demonstration database that is hosted on dev.openntf.org.
If you have an account @ openntf.org, you can see the app working with that database. And you can switch between the browser-interface and the app to see how good a job the app does of keeping the two in sync.
You can install the DomDisc app from the Google Play app store.