Update: I have installed SSL certificates for all of my sites which have images on this site. All of the side bar images are back up.
One of the reasons I migrated from Typepad to another hosting provider, was so I could enable SSL on my site. Making sure your site supports SSL is the one of the basic efforts you can do to support encrypting the web.
I set it up for my main domain a few weeks ago, but since some of the images I use are on sites that didn’t use https, my blog did not appear to be completely secure.
One up shot of this effort is that I have a nice set of instructions that work for my setup which will help speed the process in the future.