Over two million registered Flickr users and counting have discovered the ease and fun of organizing their photo libraries, showing off their favorite pictures to the world, and securely sharing their private pictures with friends, family, or ad hoc groups. But Flickr's own plethora of intuitive menus, options, and features just scratches the surface.

The tips and tools in Excel Hacks include little known "backdoor" adjustments for everything from reducing workbook and worksheet frustration to hacking built-in features such as pivot tables, charts, formulas and functions, and even the macro language. This resourceful, roll-up-your-sleeves guide shows you new ways to make Excel do things--from data analysis to worksheet management to import/export--that you never thought possible. Excel Hacks increases productivity with Excel and gives you hours of "hacking" enjoyment along the way.

Voice over Internet Protocol (VoIP) is gaining a lot of attention these days, as more companies and individuals switch from standard telephone service to phone service via the Internet. The reason is simple: A single network to carry voice and data is easier to scale, maintain, and administer. As an added bonus, it's also cheaper, because VoIP is free of the endless government regulations and tariffs imposed upon phone companies. VoIP is simply overflowing with hack potential, and VoIP Hacks is the practical guide from O'Reilly that presents these possibilities to you. It provides dozens of hands-on projects for building a VoIP network, showing you how to tweak and customize a multitude of exciting things to get the job done. Along the way, you'll also learn which standards and practices work best for your particular environment.

Now power users can rejoice! Windows XP Hacks offers tips, tools, and know-how to bend Windows XP to your will. The book delves into XP topics such as controlling the control panel, changing unchangeable icons, removing uninstallable XP components, stopping pop-up ads, taking a bite out of cookies, speeding up file downloads, protecting yourself with firewalls and proxy servers, and more. Users of both Windows XP Home Edition and Windows XP Pro Edition will find smart, timesaving, fun, and useful hacks for virtually every feature in their operating system. Even if you're not a power user yet, this book will have you well on your way.