I've been experimenting with APRS for the last year or so. There are a lot of areas that I go that don't have digipeaters or iGates. (Luckily, I live about three blocks from one, so around home I'm good!)
I'm debating building a portable iGate/digipeater... something I can deploy wherever I stay for a few days that can get packets online and repeated, if there isn't good APRS infrastructure nearby. I'd prefer that this would run under Linux, as that is my preferred operating system.
What suggestions can you make for hardware and software? Something Raspberry Pi-based might be pretty inexpensive to build, and portable, but I'm open-minded.