How can I simply provide a link (in a post such as this) so that people can click and it will play?
You may want to create an m3u file for each mp3 file, and then give people the option to click the m3u to stream, or the mp3 to download.
An m3u is just a play list, and is a simple text format. For example, lets say you have an mp3 file here:
mywebserver/my_cool_song.mp3
You would create an m3u file (my_cool_song.m3u) that contains this text:
http://mywebserver/my_cool_song.mp3If someone clicks the m3u file it will start streaming the file. You would provide a link in the post to the m3u file.
Hope that helps.