It's great fun, and a wonderful hobby! (It's also known as "ham radio"; you'll see both in these articles.)
Background on the Hobby
Amateur radio is the most versatile radio service in many ways. You can do plenty with it that you can't with a cellphone.
Why get involved with amateur radio? Yes, it's fun and useful even in this age of cellphones, VOIP, and Skype.
How to get started with amateur radio and tips for passing your exams easily