We published to Android Market a mini travel guide app for the http://www.stateofthemap.org/ conference in Amsterdam this weekend. It does not do really much: it has pre-loaded central Amsterdam maps (good for roaming-fee-less usage), and you can use some on-line OSM maps and of course GPS too. Only extra content is location of the conference venue. So it is more like as a proof of a concept application based on our MGMaps Lib SDK tools. If you want sources, email jaak@nutiteq.com
Search from Android market using keyword "sotm", it's free.