Ericsson labs have released an OSM library:
A couple of months ago we released support for OpenStreetMap maps for our Web Maps API and the Java ME version of the Mobile Maps API. We are now happy to release it for the Android version of our Mobile Maps API. Mobile Maps for Android with OpenStreetMap allows any developer to integrate the maps from the OpenStreetMap project into any Android application and have them rendered in the fast and dynamic Mobile Maps engine.
This should be good news for anyone trying to include maps with Android work where the Google Maps app isn’t available (the Android-x86 Project, http://www.android-x86.org/ for example). Unfortunately this does not appear to be an open source project though.