Themes are still getting converted for Custom Colors, and they should be done soon. In the mean time:

1) Does anyone know the code to change the colors of the page titles displayed in the menu?

Here is an example that will change the main link color to yellow and the links in the dropdown menus to dark orange:

#page-nav a {
	color: yellow;
}

#page-nav .nav li ul li a {
	color: darkorange;
}

You can choose different color codes at http://automattic.github.com/Iris/ if you'd like.

1) Does anyone know the code to change the colors of the page titles displayed in the menu?
3) I changed the color of the Post Titles to crimson, and in doing so, messed something up. There is no longer a space between the title of the post and the text. Does anyone know how to make sure there is a space between the title and the content?

Thank you!