The book includes lots of example code including showing you how to integrate maps with other APIs like the Yahoo! Travel API and Flickr API. Also has good coverage of creating mashups using Flex 2. You will find all the code for the book at their companion site www.mashupexperts.com.
Speaking of Yahoo! Maps using Flash via Flex: As we noted last month the Yahoo! Developer Network folks are actively soliciting feedback from developers and it turns-out the most voted-upon item in the YDN Suggestion Box is a Flex 2 API for Yahoo! Maps. 245 votes so far.
Author Chuck Freedman also happens to be creator of today’s Mashup of the Day: GameTripping.com, the Ballpark Guide. This full-featured mashup lets you to share and collect your experiences visiting ballparks across the US. Features a guide and gallery powered by Yahoo! Maps and Flickr. Ballpark Collection shows an array of all ballparks, highlighting ones you have reviewed. Even has a GameTripping badge available that lets you show off your reviews on your blog or MySpace and links users back to your Ballpark Collection. You can read more about this on Chuck’s blog.