Anyone who joins can make new posts.
To post a link, use the "edit html" tab. (You can do this after you've composed your message.)
Clink on the link icon, and you'll be prompted for the url (which I assume you'll already have copied by now). Paste it in. You'll notice that there are two tags to open and close the link, both begin and end with < and >. Type the text you want the user to actually click on before the second of those two tags.
Here's a sample link to a tutorial on the story "Symbols and Signs" by Nabokov. You'll note that this is much friendlier to your reader than simply pasting a link in, which they have to copy and paste into the address bar, etc.
For a youTube video (such as Tim's from the email today), use a feature of youTube itself. Click on "share". There should be a little box somewhere with "embed link". Copy the code from that, and simply paste it into the edit html text thing. I did just that to get the results below.
