Thanks to Tully, I've been playing around with trixbox all day. Mostly just trying to get things to work right since I'm such a newb at all this. If anyone wants to call into it, the phone number is 813-377-1191. I got the cheapest package which only allows 2 incoming phone calls at a time and I'm not sure what kind of message you'll get if 2 people are on and the system is busy.
I've been wanting to set one of these up for a long time. Not quite sure what I'll do with it, but I'll try to make it something fun. Any ideas? I'd definitely like to set up a "voice BBS" like the old Defcon voice bridge used to have. I loved that thing. Hopefully there's a way to do that with trixbox. I'm thinking some choose your own adventure type stories would be fun too.
I won't be setting up a conference bridge on it since it's using my home's bandwidth and would probably sound shitty, especially on the 1.77GHz machine I've got it running on.