The Ym4r/Mapstraction plugin for Rails has been released: It helps the use from Rails apps of the Mapstraction JS library, which provides a common API for Google Maps, Yahoo! Maps and Virtual Earth so one can switch between them easily. There have also been some updates to the GM plugin: See more details at http://thepochisuperstarmegashow.com/2006/07/22/ym4rgm-update-ym4rmapstraction/