John Goerzen points to “an article about building your own linux-based PBX”:http://techdatapros.com/asterisk/. This isn’t just some VOIP solution, either–that apparently wouldn’t even cost you $20–but a full-fledged runs-over-POTS-lines system.
Hmm. Maybe if I get that Micro-ATX Pentium-M motherboard that I’ve been thinking about for my little server system, I could then shove the Mini-ITX motherboard back inits even smaller case and use that…