I am no experienced blogger and still need to experiment with my settings.
Today I opened for unregistered users to comment, just to see what happens. If there comes a lot of spam and flames, I will probably switch the parameters back again.
Addendum 16th February 2007
I didn't realize that all reader comments would be emailed to me for approval before appearing in the blog. But except for the delay, this may actually be a very good way of avoiding spam. So until further notice I leave my settings as they are.
It seems the best way to read comments is to click on the heading of the main entry.