Linux Alternatives to Windows SBS Part One

Yet another (good) argument for avoiding SBS...

"I've claimed that Microsoft's Small Business Server (SBS) is hampered by its built-in limitations. These constraints have been designed in. Why would you opt for SBS when you could have it all using Linux? It's time to put my money where my mouth is. Here's what I look for in a Linux-based solution and starting today not one, but five, options to pick from..."