If you want to serve up your Filemaker Databases to the outside world, Filemaker Server and a Mac mini make a great combination.
For an Intel mini, Filemaker recommends any a Dual Core CPU, 2GB of RAM, and an 80+ GB hard drive. All of these specs can easily be matched with a Mac mini.
We have a lot of customers who needed to get their databases in a place that they could connect from anywhere in the world. Filemaker Server, a Mac mini server, and Macminicolo.net fit the bill perfectly.