Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Covers everything that's possibly related to wireless!

If you want to learn wireless and mobile commerce development this is the best place to start. The 34 lessons cover the absolute basics of "what is ... ?" to actual coding. It uses audio, code examples and more resources than you can possibly get through in a lifetime. Better, the web site that the authors put up to support the book provides even more material.I like the way that authors cover all technologies with no favoritism. There is something for every developer and platform, including Palm, Pocket PC, WAP, WML/WMLScript, Web Clipping, i-Mode, Bluetooth, XML, J2ME, .NET, Qualcomm BREW. The audio is over 9 hours, and over 10 thousand lines of code is provided to play with and learn from. If you don't have the time or budget for training this is a great way to learn on your own time at a reasonable cost.