Google Geo developers team have posted three new articles to get you started on adding maps to mobile and using App Engine for spatial search:

• Overview of Mobile Development Options for the Google Maps API – Putting a map on a phone seems natural these days. This article goes over options for developing a Google Map for a mobile application.
• Loading a Maps API site in a Native Android Application – Google Maps API Version 3 was designed to be used in a mobile environment. If you want to include a V3 page in a native Android application, this’s how to get started.
• Geospatial Queries with Google App Engine using GeoModel – Many developers’re moving their applications to cloud computing. Here's how to get started with geospatial queries building on Google App Engine.