All logins and edits are now using SSL by default and return to non-SSL when not needed.
I installed the Drupal "secure pages" module, that allows us to set what pages in Drupal should be set to use SSL. It is nice and easy to configure. The only side effect was that I had to turn off the login block on the front page of the site, and replace it with a link to the secured login screen. We could likely modify the block's code but for now this was easiest.
Let me know if it causes any issues. I've read that IE6 or other browsers might complain when it sees you get redirected from https - > http etc. but I haven't seen any issues like this personally.
Tyler