Time for me to get into tech mode here! I finally figured out what was slowing down this blog from loading in Internet Explorer or any other browser. Culprit: the Subscribe gadget from Google Gadgets.
Using time tested troubleshooting techniques, I removed all my widgets and gadgets, added them back in one at a time, and after each addition cleared my browser cache and did a page reload. After a short time, I could see that the gadget which allows visitors to subscribe to Destination: Austin Family in various ways was causing the problem.
I'm not very interested in the "why" right now. If a visitor really likes this blog, they will most likely subscribe using various other methods. What is vexing me now is getting the feedback to Google so they can work to improve what could be a valuable gadget. But for now, a slow page load is not worth using the Subscribe gadget.