My favourite site for Shortwave Radio info is SWLing.com and their blog The SWLing Post
"I Trawl the Megahertz", by the way, is a album by Paddy McAloon out of Prefab Sproutone of my favourite bands. Paddy was going blind at the time, and spent long hours at night listening to shortwave.
The Low Power AM Radio Network
If you haven't started fooling around with a Raspberry Pi yet, I reccomend the CanaKit sets.
Yes, you are going to have to leard the dread LINUX, but there's so much info on the web and youtube now that you can just follow along and learn as you go.
So, I used to do a radio show a few years ago. Those of you who are Gen X and grew up on "college rock" (alternative before it was called alternative) may appreciate rummagaing through the old episodes.