I downloaded and installed Asterisk@Home this morning. I installed onto a Virtual PC image which turned out to be a painless process. Download the ISO image, create a virtual machine and boot it up with the ISO image attached. The disk is formatted/partitioned , the OS installed, and Asterisk built from source, all automatically.
I'm not sure what I will do with it but I want to learn more about VOIP and SIP. Maybe once I have tinkered around with the VPC install for a while I'll install Asterisk on an old PC I have lying around, buy a voice modem card, and attach the system to my second phone line.