I don't like to toot my own horn, but I'm happy if others happen to toot it for me.
If you're still wondering whether this book is for you, check out the review. Geertjan does the best job I've seen yet of describing the content and the reasons why any Swing developer should read it.
Or if you're still wondering what Swing is and what book I'm talking about, then I have no idea what you're doing here to begin with. But I'd encourage you to get the book anyway.