Thing 3: other Blog Search Engines

I found a link (http://websearch.about.com/od/internetresearch/a/newsblog.htm) to some other blog search engines. One mentioned is Opinmind, which sounds really cool! It puts search results into two columns one green for pro and one blue for con. I really want to try this one out. However, I am having difficulties: I go to the site, but cannot find a search bar, search screen, search field, search page....

I am moving on to another search engine, but will come back to this one because it looks very interesting, if I can just figure out how to use it........

Maybe you have to join.....I just found a join button. If anybody figures this out, please let me know! I'm, feeling kind of dense........