Navigation and forums for Fun theme

A couple of questions:

1. The navigation at, how can I change the color of the link of the page you are on from black? Couldn't find it in the css.

2. In the navigation, how can I adjust the dropdown links so they are not covering the above main nav links?

3. The forums: we would like to make our forums a little more presentable, like you have in your forums here, these are attractive and easy to use forums. The forum in our theme is not that appealing. Any suggestions?

Thanks for your help in advance!