Amateur Radio and Linux
Here is a collection of tips for using amateur radio on Linux.
Automatic CQ calling for contests (example is for a SignaLink USB, but can be easily adapted for other uses)
(Hams appear to call these "reflectors")
linux-hams, the primary general mailing list for Linux ham discussion. Readers are generally fairly knowledgeable about Linux technically. Also has discussion about AX.25 development.
Linuxham, a Yahoo group. The core topic surrounds fldigi and similar programs, but discussions seem to range to any Linux-related topic. Probably the better list for newbies to look for.