Mike, check out
http://www.discoveryowners.com/cginfolinks.htm for a good collection of POIs that you can import to SA. To import them, download the .txt version and unzip it. Put the .txt file in c:\\Delorme Docs\Draw. I tried to use the files in the column labled Delorme Street Atlas, .an1 files , but could not get them to work. Reading a bit of the Delorme SA forum it appears that there may be a bug in SA 2009.
Then in SA go to the "Draw" tab, then click on "File", then "Import". Select the file you want to import, click on "Open", then "OK" on the info box and the POIs will appear on the map. These are not zoom dependant. You can leave them in the file you save and turn them on and off as required, not like S&T where once you save them they are visible forever. Probably there is a difference in what SA and S&T consider interesting points. Almost forgot, you have to be using the Advanced File Management option.
Marvin, you are right, it could take a long time to master SA.