Your own post covered much of what I would normally say.
When you move off blogspot, you will be able to apply a better skin and your ad placement will change. Your current ad placement is pretty decent.
Your meta tag structure will also change when you move off blogspot. At that point, you should go through Joost de Valk's WordPress SEO: The Definitive Guide To High Rankings For Your Blog.
What to add? A graphic in the banner would make the site more appealing, but that too should probably be done after the switch to WordPress.
I think the topic is a great one. I wish I had known about iRobot (creators of the Roomba) and Kiva Systems early enough to invest in them when they were small.