Yahoo logo should be in the Search section, on the left side of the search input box. It works for Google, so it should work for Yahoo!.

In the middle column, less space between posts. In the right column, closer to the middle column.

Also, section off categories. The posts seem too random. This may be the reason why people go to Google news because it is more organized.

Yahoo! is awesome! All you need is a little organizing on your site layout and you will be set!