I have always used NOAA Weather as the primary station content, spiced up with a few PSAs taken from www.radiospace.com and some home made bumpers and station IDs.
My first transmitter was a little home brew unit built from a schematic in a book, then I upgraded to a Pan Axis AM 100 chopper, which I used for several years in continuous duty, then went to the Gizmo from Vintage in England, and just acquired a Talking House.
Content is managed by the Scrap Computer Audio Source Project and I usually have a monitor I can check on line.
At my new location I can tune no fewer that three NOAA stations (Whee!) so I'm in the process of upgrading the SCASP to control two additional NOAA Wx inputs.
My faithful old Pentium 166 streaming audio server gaaked a while ago so I'm in the process of replacing that, too.
Experimental broadcasting for a better tomorrow!